$77 Cheap Flights from Raleigh (RDU) to St. Louis (STL)

View $77 flight on Sun, Oct 12, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $77 for one-way flights and $145 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Oct 19 - Sun, Nov 9
RDU
Raleigh
STL
St. Louis
$145 Roundtrip, found 1 day ago
$145
Roundtrip
found 1 day ago
Select United flight, departing Sun, Oct 19 from Raleigh to St. Louis, returning Sun, Nov 9, priced at $145 found 1 day ago
United
Sun, Oct 19 - Mon, Nov 10
RDU
Raleigh
STL
St. Louis
$149 Roundtrip, found 1 day ago
$149
Roundtrip
found 1 day ago
Select United flight, departing Sun, Oct 19 from Raleigh to St. Louis, returning Mon, Nov 10, priced at $149 found 1 day ago
United
Fri, Dec 5 - Mon, Dec 8
RDU
Raleigh
STL
St. Louis
$152 Roundtrip, found 3 days ago
$152
Roundtrip
found 3 days ago
Select United flight, departing Fri, Dec 5 from Raleigh to St. Louis, returning Mon, Dec 8, priced at $152 found 3 days ago
Frontier Airlines
Thu, Oct 2 - Fri, Oct 3
RDU
Raleigh
STL
St. Louis
$154 Roundtrip, just found
$154
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Oct 2 from Raleigh to St. Louis, returning Fri, Oct 3, priced at $154 just found
American Airlines
Tue, Nov 11 - Fri, Nov 14
RDU
Raleigh
STL
St. Louis
$157 Roundtrip, found 1 day ago
$157
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Nov 11 from Raleigh to St. Louis, returning Fri, Nov 14, priced at $157 found 1 day ago
United
Wed, Nov 12 - Tue, Nov 18
RDU
Raleigh
STL
St. Louis
$160 Roundtrip, found 4 days ago
$160
Roundtrip
found 4 days ago
Select United flight, departing Wed, Nov 12 from Raleigh to St. Louis, returning Tue, Nov 18, priced at $160 found 4 days ago
Frontier Airlines
Thu, Oct 9 - Fri, Oct 10
RDU
Raleigh
STL
St. Louis
$163 Roundtrip, found 4 hours ago
$163
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Thu, Oct 9 from Raleigh to St. Louis, returning Fri, Oct 10, priced at $163 found 4 hours ago
United
Sat, Oct 18 - Mon, Oct 20
RDU
Raleigh
STL
St. Louis
$167 Roundtrip, found 1 day ago
$167
Roundtrip
found 1 day ago
Select United flight, departing Sat, Oct 18 from Raleigh to St. Louis, returning Mon, Oct 20, priced at $167 found 1 day ago
Delta
Sun, Oct 19 - Sun, Nov 9
RDU
Raleigh
STL
St. Louis
$176 Roundtrip, found 1 day ago
$176
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, Oct 19 from Raleigh to St. Louis, returning Sun, Nov 9, priced at $176 found 1 day ago
Southwest Airlines
Wed, Dec 3 - Wed, Dec 17
RDU
Raleigh
STL
St. Louis
$239 Roundtrip, found 4 days ago
$239
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Wed, Dec 3 from Raleigh to St. Louis, returning Wed, Dec 17, priced at $239 found 4 days ago

Find the cheapest month to fly from Raleigh (RDU) to St. Louis (STL)

October is typically the cheapest month to fly

From $154 - $364 per traveler.

Frequently asked questions

How much does a flight from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL) cost?
Lock in a cheap one-way flight from $77 or cheap return flight from $145 from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL)?
October is the least expensive month to fly from RDU to STL. Avoiding peak travel times is often the key to finding better fares.
Which airlines fly direct from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL)?
You can fly nonstop from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL) on a Southwest Airlines flight.
What is the cheapest airline that flies from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest RDU to STL flight.
How many flights per day from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL)?
On average, only 1 nonstop flight departs each day from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL). Need other options? Use Expedia's filter tool to find flights with layovers and explore a new city along the way.
What are the most popular departure times for flights from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL)?
The 9 AM departures from RDU to STL are typically the busiest. They can also be more expensive. If you want to save on your trip, pick a less crowded time to fly.
What day of the week has the most flights from RDU to STL?
Wednesday offers the most flights from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL). Consider taking off on this day and you'll have a greater chance of finding a departure that fits your itinerary.
What is the earliest flight from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL)?
The earliest flight departing from Raleigh - Durham Intl. Airport (RDU) is at around 9:05AM UTC-5. Catch this flight and you'll land at Lambert-St. Louis Intl. Airport (STL) at approximately 10:20AM UTC-6. The total flight duration is 2h 15m.
How long does it take to fly from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL)?
Flights from RDU to STL have an average travel time of 2 hours and 15 minutes. The distance between the two airports is 670 mi.
What is the best time to fly from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL)?
Opt for a flight from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL) that leaves before 3 PM to reduce the likelihood of delays. Departures after this hour are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for St. Louis from Raleigh - Durham Intl. Airport (RDU)?
Browse your flight options from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL). This is the only St. Louis airport you can touch down at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your ticket from RDU to STL just before your trip is usually more expensive. But if you're flexible with your travel dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a RDU to STL flight and hotel package?
Compared with arranging hotels and flights separately, booking a RDU to STL flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one convenient place takes the hassle out of travel planning. Simply pick your flights and select from our extensive range of hotels, then customize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Raleigh - Durham Intl. Airport (RDU) to Lambert-St. Louis Intl. Airport (STL)?
If you booked your RDU to STL flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

Travel 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
$144
Distance
665 mi
Average flight time
1 hour 5 mins

Book with confidence

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 2025. You can also book with separate airlines for your outbound and return journeys, from $77 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

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Explore a world of travel with Expedia

*Available to One Key members.