Cheap Flights from Raleigh (RDU) to St. Louis (SUS)

Popular airlines from Raleigh-Durham International Airport (RDU) to St. Louis, MO (SUS-Spirit of St. Louis)

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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 $120
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $120
Flights from Raleigh (RDU) to St. Louis (SUS)
Origin airport
Raleigh - Durham Intl.
Destination airport
Spirit of St. Louis
Distance
679 mi

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 . 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 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.

 

Frequently asked questions

How much does a flight from Raleigh - Durham Intl. Airport (RDU) to Spirit of St. Louis Airport (SUS) cost?
Lock in a cheap one-way flight or cheap return flight from Raleigh - Durham Intl. Airport (RDU) to Spirit of St. Louis Airport (SUS) 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 Spirit of St. Louis Airport (SUS)?
is the most affordable month to fly from RDU to SUS. Planning your trip for the off-season is often the key to better flight prices.
What is the cheapest airline that flies from Raleigh - Durham Intl. Airport (RDU) to Spirit of St. Louis Airport (SUS)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll take you from RDU to SUS. Then, sort your results by "Price (lowest to highest)" to snag a great deal.
How many flights per day from Raleigh - Durham Intl. Airport (RDU) to Spirit of St. Louis Airport (SUS)?
You'll have to take a flight with a layover if you're traveling from Raleigh - Durham Intl. Airport (RDU) to Spirit of St. Louis Airport (SUS). There are no daily direct flights on this route. However, just filter your search to include one or two stops to find the best option for your trip.
What day of the week has the most flights from RDU to SUS?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Raleigh - Durham Intl. Airport (RDU) to Spirit of St. Louis Airport (SUS)?
To touch down at Spirit of St. Louis Airport (SUS) without delays, pick a flight that leaves from Raleigh - Durham Intl. Airport (RDU) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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)?
Lambert-St. Louis Intl. Airport (STL) is the only airport in St. Louis with direct flights from Raleigh - Durham Intl. Airport (RDU). Consider your options and discover cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Raleigh - Durham Intl. Airport (RDU) to Spirit of St. Louis Airport (SUS) last-minute?
Last-minute bookings from RDU to SUS are usually more expensive. For the best prices, start searching for flights well in advance. That said, if your travel plans are flexible, you may score a cheap fare right before you leave.
Is it cheaper to book a RDU to SUS flight and hotel package?
Compared with arranging flights and hotels separately, booking a RDU to SUS flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one convenient place will take the stress out of planning your trip. Just pick your flights and select from our wide range of stays, then customize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Raleigh - Durham Intl. Airport (RDU) to Spirit of St. Louis Airport (SUS)?
It's generally possible to cancel or reschedule your RDU to SUS flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more information on our Customer Service portal.

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