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$129 Cheap Flights from Raleigh (RDU) to St. Louis (STL)

View $129 flight on Thu, Oct 22, 2026Opens in a new window

Popular airlines from Raleigh-Durham International Airport (RDU) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Raleigh to St. Louis (RDU-STL)

Prices were available within the past 7 days and start at $129 for one-way flights and $238 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Oct 8 - Sat, Oct 10
RDU
Raleigh
STL
St. Louis
$238 Roundtrip, found 1 day ago
$238
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Oct 8 from Raleigh to St. Louis, returning Sat, Oct 10, priced at $238 found 1 day ago
Southwest Airlines
Mon, Oct 26 - Thu, Oct 29
RDU
Raleigh
STL
St. Louis
$248 Roundtrip, found 1 day ago
$248
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Mon, Oct 26 from Raleigh to St. Louis, returning Thu, Oct 29, priced at $248 found 1 day ago
Frontier Airlines
Wed, Sep 30 - Fri, Oct 2
RDU
Raleigh
STL
St. Louis
$257 Roundtrip, found 2 days ago
$257
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, Sep 30 from Raleigh to St. Louis, returning Fri, Oct 2, priced at $257 found 2 days ago
Frontier Airlines
Thu, Oct 22 - Thu, Oct 29
RDU
Raleigh
STL
St. Louis
$258 Roundtrip, just found
$258
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Oct 22 from Raleigh to St. Louis, returning Thu, Oct 29, priced at $258 just found
Frontier Airlines
Fri, Oct 23 - Mon, Oct 26
RDU
Raleigh
STL
St. Louis
$259 Roundtrip, found 1 day ago
$259
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Oct 23 from Raleigh to St. Louis, returning Mon, Oct 26, priced at $259 found 1 day ago
Southwest Airlines
Tue, Oct 13 - Tue, Oct 20
RDU
Raleigh
STL
St. Louis
$264 Roundtrip, just found
$264
Roundtrip
just found
Select Southwest Airlines flight, departing Tue, Oct 13 from Raleigh to St. Louis, returning Tue, Oct 20, priced at $264 just found
Frontier Airlines
Thu, Sep 3 - Wed, Sep 16
RDU
Raleigh
STL
St. Louis
$268 Roundtrip, found 2 hours ago
$268
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Sep 3 from Raleigh to St. Louis, returning Wed, Sep 16, priced at $268 found 2 hours ago
American Airlines
Sat, Sep 19 - Mon, Sep 21
RDU
Raleigh
STL
St. Louis
$281 Roundtrip, found 1 day ago
$281
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Sep 19 from Raleigh to St. Louis, returning Mon, Sep 21, priced at $281 found 1 day ago
United
Wed, Dec 9 - Wed, Dec 16
RDU
Raleigh
STL
St. Louis
$300 Roundtrip, found 6 days ago
$300
Roundtrip
found 6 days ago
Select United flight, departing Wed, Dec 9 from Raleigh to St. Louis, returning Wed, Dec 16, priced at $300 found 6 days ago
Delta
Sat, Sep 5 - Thu, Sep 10
RDU
Raleigh
STL
St. Louis
$321 Roundtrip, found 1 day ago
$321
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Sep 5 from Raleigh to St. Louis, returning Thu, Sep 10, priced at $321 found 1 day ago

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $466
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $466

What you need to know for your flight from Raleigh - Durham Intl. to Lambert-St. Louis Intl.

Raleigh (RDU) to St. Louis (STL) at a glance

Travel from Raleigh-Durham International Airport (RDU) to Lambert-St. Louis International Airport (STL) with a variety of airlines offering this convenient domestic short-haul route. Explore options from both full-service and budget carriers to discover the best itinerary that matches your travel plans, schedule, and budget. Whether you're seeking cheap flights from Raleigh or looking for the cheapest flights from Raleigh, you'll find the ideal choice to experience the iconic sights and vibrant neighborhoods of St. Louis.

  • Fastest flight duration: around 2h 15m non-stop
  • Route distance: roughly 700 miles (1,130 km)
  • Flights per week: around 15+ flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $100–$405, depending on seasonality and how far ahead you book

Flights from Raleigh - Durham International Airport (RDU) to Lambert-St. Louis International Airport (STL)

Recent traveler bookings highlight the most popular airlines flying from Raleigh to St. Louis, with a focus on both one-stop and non-stop flights. Many passengers opt for convenient layovers at Charlotte-Douglas International Airport (CLT), which typically has a 55-minute connection, as well as Hartsfield-Jackson Atlanta International Airport (ATL) and O'Hare International Airport (ORD), both featuring approximately 1 hour and 15 minutes layover times. This variety allows you to compare options based on price, total travel time, and cabin class to find your ideal itinerary.

  • American Airlines: This full-service airline provides one-stop options, holding about 42% of departures on this route. One-way ticket prices generally fall between $105 and $330, with an in-flight duration of 3 hours and 15 minutes, leading to a total trip time of approximately 4 hours and 30 minutes, including layover time.
  • Southwest Airlines: As a budget-friendly carrier, Southwest offers both non-stop and one-stop services. It represents around 34% of the flights on this route, with one-way fares typically ranging from $110 to $465. Expect a direct flight time of about 2 hours and 15 minutes.
  • Delta: Delta, a full-service airline, features one-stop flights and covers roughly 14% of departures for this route. One-way fares usually span from $100 to $355, with an in-flight time of 3 hours and 15 minutes. The overall journey time, including layovers, is about 4 hours and 30 minutes.
  • Frontier Airlines: This low-cost carrier provides one-stop service, accounting for approximately 7% of departures on this route. One-way fares generally range from $100 to $175, with an in-flight duration of 3 hours and 15 minutes, leading to a total travel time of around 4 hours and 30 minutes, including layovers.
  • United: As a full-service airline, United offers one-stop options and makes up roughly 3% of departures on this route. One-way fares typically range from $135 to $375, featuring an in-air time of 3 hours and 15 minutes, with the entire journey taking about 4 hours and 30 minutes, including layover time.

Travelers can upgrade their flight from Raleigh to St. Louis, with American Airlines providing first-class service on this route.

Best time to fly from Raleigh (RDU) to St. Louis (STL)

The most popular months for travelers flying from Raleigh to St. Louis are January, March, and April, when peak temperatures in St. Louis reach up to 56.1°F in April. If you prefer quieter travel, consider September, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 70.9°F. For better deals, February usually offers the lowest average one-way fare around $187. Flight availability peaks in March, April, October, and November, with approximately 21 flights per week, making it easier to find convenient departure times. July has the fewest flights, with approximately 15 flights per week.

  • Cheapest time to fly: February usually offers good deals with average one-way fare around $187, roughly 14% cheaper than the yearly average.
  • More budget-friendly months to fly: January and October typically offer average one-way fares of around $200.
  • Most flight options: March, April, October, and November have the highest number of flights from Raleigh to St. Louis, with approximately 21 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January31.6°F (-0.2°C)Moderately High17$198
February34.9°F (1.6°C)Average18$187
March46.4°F (8.0°C)Moderately High21$209
April56.1°F (13.4°C)Moderately High21$211
May66.6°F (19.2°C)Average20$222
June76.1°F (24.5°C)Average20$245
July78.6°F (25.9°C)Moderately Low15$255
August77.0°F (25.0°C)Moderately Low18$222
September70.9°F (21.6°C)Moderately Low20$217
October58.6°F (14.8°C)Average21$203
November46.2°F (7.9°C)Average21$248
December37.8°F (3.2°C)Average20$208

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from Raleigh (RDU) to St. Louis (STL)

  • Greensboro to St. Louis (GSO-STL): Piedmont Triad International Airport (GSO) is approximately 66 miles from Raleigh-Durham International Airport (RDU). On this route, one-way economy fares generally fall between $110 and $325, influenced by the season and advance booking. Travelers will often find one-stop options with popular layover points at Hartsfield-Jackson Atlanta International Airport (ATL) and Charlotte-Douglas International Airport (CLT). Key airlines serving this route include Delta and American Airlines, and first class service is also available.
  • Fayetteville to St. Louis (FAY-STL): Fayetteville Regional Airport (FAY) is located about 61 miles from Raleigh-Durham International Airport (RDU). For this route, one-way economy prices typically range from $150 to $410, depending on the season and when you make your reservation. This route is commonly serviced by one-stop flights, with popular layover locations at Charlotte-Douglas International Airport (CLT) and Hartsfield-Jackson Atlanta International Airport (ATL). Major airlines on this route include American Airlines and Delta, with first class service also offered.

How to find the best prices for flights from Raleigh (RDU) to St. Louis (STL)

Getting some of the best deals on flights from Raleigh to St. Louis is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually found when booking 2-8 weeks in advance, which aligns with when most travelers make their reservations. Morning departures from 5 am to 12 pm often provide lower prices and are also the most sought-after times. Additionally, flying on Tuesday typically results in cheaper rates, while Friday remains the most popular travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Lambert-St. Louis International Airport from Raleigh - Durham International Airport

St. Louis welcomes travelers from Raleigh with a range of transport options based on price, convenience, and proximity. For departures, Raleigh - Durham International Airport is roughly a 20-minute drive (covering about 15 miles) from central Raleigh. Here's how to reach St. Louis efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in St. Louis, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Lambert-St. Louis International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Lambert-St. Louis International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Lambert-St. Louis International Airport, Lambert Main Terminal Station, a metro station, is located about 0.1 miles away on foot.

Frequently asked questions

How much does a flight from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
You can find cheap one-way flights from $129 and cheap return flights from $238 Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) with Expedia. One-way flights usually range from $172 to $613, and return flights typically cost between $330 and $950. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
August is typically the cheapest month to fly from Raleigh (RDU) to St. Louis (STL), with average round-trip fares around $348. This price is about 12% lower than the average throughout the year, as travel demand is generally lower during this time. Other economical months to consider are January and October.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Enter RDU to STL and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Southwest Airlines is one of the cheapest airlines offering nonstop flights from Raleigh - Durham Intl. (RDU) to Lambert-St. Louis Intl. (STL), with round-trip tickets starting from around $202.97. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
To find a cheap flight from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best airline to fly with from Raleigh, NC (RDU) to St. Louis, MO (STL) will differ from traveler to traveler. If you like to fly early, WN offers early morning flights. If price is the most important factor, WN typically offers the lowest fares. American Airlines offers the most daily flights from RDU to STL, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best time to fly from Raleigh (RDU) to St. Louis (STL) is in August or October. You can expect return flights to be around $348, which is a great deal. August is particularly appealing as it allows you to enjoy the summer vibes before the fall season begins.*Prices based on flights available on Expedia in the last year.
How many flights per day from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
On average, there are around 2 nonstop flights per day from Raleigh - Durham Intl. (RDU) to Lambert-St. Louis Intl. (STL). For more options, look at flights that include layovers.
What is the earliest flight from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The earliest flight from Raleigh, NC (RDU) to St. Louis, MO (STL) usually departs at around 5:00 AM, operated by American Airlines. This seasonal service is available in December, making it a great option for early risers looking to maximize their time in St. Louis. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from Raleigh, NC (RDU) to St. Louis, MO (STL) are in the morning, from 6am to 9am. About 24% of passengers prefer this time window. Many major carriers, including American Airlines and Southwest Airlines, offer flights during this window. This timing is popular because it allows you to arrive in St. Louis with plenty of time to enjoy the city.
How long does it take to fly from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Flying nonstop from RDU to STL takes around 2 hours 20 minutes, with the route covering approximately 666 miles. Flights with a layover typically take 3 hours longer than direct options. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You can fly first class between RDU and STL. First class cabins are available on:

  • American Airlines
  • Delta Air Lines
  • United Airlines

How do I earn miles on a Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight with Expedia?
It's easy to earn miles on a Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for St. Louis from Raleigh - Durham Intl. (RDU)?
From Raleigh - Durham Intl. (RDU), you can fly into Lambert-St. Louis Intl. (STL) to reach St. Louis. Some flights may connect through major hubs like Washington Dulles Intl. (IAD), Baltimore Washington Intl. Thurgood Marshall (BWI), Liberty Intl. (EWR) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) at the last minute?
Typically, booking a last minute flight from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package?
Securing a Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) St Louis Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
If you booked your Raleigh, NC (RDU-Raleigh - Durham Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Raleigh - Durham Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$230
Distance
665 mi
Average flight time
1 hour 3 mins

Book with confidence

Raleigh to St. Louis Flights

The cheapest times to fly from Raleigh to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Raleigh to St. Louis are during the month of October. You can find some of the cheapest flights from Raleigh to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Raleigh to St. Louis

Sunday is one of the best days to book for cheap flights from Raleigh to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Raleigh to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Raleigh to St. Louis in 2026. You can also book with separate airlines for your outbound and return journeys, from $129 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Raleigh to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Raleigh to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Raleigh to St. Louis Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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