HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$70+ Cheap flights from Raleigh to St. Louis (RDU - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — STL
Aug 16 — Aug 231
Sun 8/16
Sun 8/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Raleigh to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Raleigh-Durham to Lambert-St Louis are usually found in October or January, booked 65 days in advance, depart on a Wednesday or Saturday and return on a Saturday

Cheap flight deals from Raleigh to St. Louis

Cheapest flights from Raleigh to St. Louis
Explore the most affordable flight options available from Raleigh to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 17, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/277:32 pm
RDU
-
STL
2 stops20h 24m
Frontier
Tue 8/46:34 pm
STL
-
RDU
1 stop12h 37m
Frontier
Deal found 7/13$267
This Kiwi.com deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/277:32 pm
RDU
-
STL
2 stops20h 24m
Frontier
Wed 8/54:57 pm
STL
-
RDU
1 stop14h 04m
Frontier
Deal found 7/13$268
This Kiwi.com deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/88:06 pm
RDU
-
STL
1 stop28h 53m
Frontier
Tue 8/116:34 pm
STL
-
RDU
1 stop12h 37m
Frontier
Deal found 7/13$269
This Kiwi.com deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:05 am
RDU
-
STL
1 stop12h 17m
Frontier
Fri 9/46:17 pm
STL
-
RDU
2 stops21h 53m
Frontier
Deal found 7/14$270
This Kiwi.com deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:14 pm
RDU
-
STL
1 stop15h 43m
Frontier
Sun 8/168:08 pm
STL
-
RDU
2 stops11h 03m
Frontier
Deal found 7/17$271
This Kiwi.com deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/277:32 pm
RDU
-
STL
2 stops23h 05m
Frontier
Thu 7/306:34 pm
STL
-
RDU
1 stop12h 37m
Frontier
Deal found 7/13$281
This Kiwi.com deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:29 pm
RDU
-
STL
2 stops22h 27m
Frontier
Mon 8/34:57 pm
STL
-
RDU
1 stop14h 14m
Frontier
Deal found 7/13$282
This Kiwi.com deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:29 pm
RDU
-
STL
2 stops22h 27m
Frontier
Wed 8/54:57 pm
STL
-
RDU
1 stop14h 04m
Frontier
Deal found 7/13$283
This Southwest deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/298:25 am
RDU
-
STL
Nonstop2h 05m
Southwest
Sat 9/59:00 am
STL
-
RDU
Nonstop1h 50m
Southwest
Deal found 7/14$284
This Kiwi.com deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/306:15 am
RDU
-
STL
1 stop12h 22m
Frontier
Fri 7/314:57 pm
STL
-
RDU
1 stop6h 07m
Frontier
Deal found 7/13$285
This Kiwi.com deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/277:32 pm
RDU
-
STL
2 stops20h 24m
Frontier
Sat 8/14:57 pm
STL
-
RDU
1 stop6h 06m
Frontier
Deal found 7/13$286
This Kiwi.com deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/306:15 am
RDU
-
STL
1 stop12h 22m
Frontier
Wed 8/58:08 pm
STL
-
RDU
2 stops12h 27m
Frontier
Deal found 7/13$287

Find flight deals from Raleigh to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Raleigh (RDU) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$267
(Kiwi.com)

One-way from

$70
(Kiwi.com)

Popular in

September

Cheapest in

October

Average price

$438

Good round-trip deal

$396 or less

Good one-way deal

$187 or less
Provider with most accurate pricing for Raleigh-Durham-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Raleigh-Durham-Lambert-St Louis flights.
Search Deals
From Raleigh-Durham to Lambert-St Louis
Search Deals
One-way flight from Raleigh-Durham to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Raleigh-Durham to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from Raleigh-Durham to Lambert-St Louis.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Raleigh to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 17, 2026.
Use the filters below to find and compare flights from Raleigh to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Mon 8/10

6:55 pm-8:00 pm

Nonstop2h 05m

Lambert-St Louis

Mon 8/17

6:50 pm-9:40 pm

Nonstop1h 50m

$297

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 9/24

6:00 am-7:05 am

Nonstop2h 05m

Lambert-St Louis

Sat 9/26

4:15 pm-7:10 pm

Nonstop1h 55m

$297

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Sat 10/31

5:15 am-10:51 am

1 stop6h 36m

Lambert-St Louis

Mon 11/2

10:45 am-3:39 pm

1 stop3h 54m

$307

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Wed 8/5

11:21 am-4:17 pm

1 stop5h 56m

Lambert-St Louis

Thu 8/13

9:15 am-2:20 pm

1 stop4h 05m

$307

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 10/29

6:00 am-7:10 am

Nonstop2h 10m

Lambert-St Louis

Tue 11/3

2:30 pm-11:05 pm

1 stop7h 35m

$307

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Sat 9/19

12:00 pm-7:45 pm

1 stop8h 45m

Lambert-St Louis

Tue 9/22

2:50 pm-11:35 pm

2 stops7h 45m

$312

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 10/15

6:10 am-11:35 am

2 stops6h 25m

Lambert-St Louis

Sat 10/24

12:55 pm-9:45 pm

2 stops7h 50m

$327

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 8/4

7:45 am-4:25 pm

2 stops9h 40m

Lambert-St Louis

Thu 8/6

2:45 pm-10:00 pm

2 stops6h 15m

$366
Quickest round-trip

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Sat 8/22

12:30 pm-1:30 pm

Nonstop2h 00m

Lambert-St Louis

Sun 8/23

6:55 pm-9:45 pm

Nonstop1h 50m

$393

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 8/14

6:55 pm-8:00 pm

Nonstop2h 05m

Lambert-St Louis

Tue 8/18

6:40 pm-9:30 pm

Nonstop1h 50m

$393

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/12

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Raleigh to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Raleigh to St. Louis in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Raleigh-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Raleigh-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Raleigh-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Raleigh-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Raleigh-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Raleigh to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Raleigh with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Raleigh to St. Louis

How far ahead should I book a flight from Raleigh to St. Louis?

Booking 64 days in advance of your planned departure date is, on average, the best time to get cheap flights from Raleigh to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Raleigh to St. Louis?

Currently, October is the cheapest month in which you can book a flight from Raleigh to St. Louis (average of $346). Flying from Raleigh to St. Louis in September is currently the most expensive (average of $473). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from RDU to STL?

Find hourly flight availability from Raleigh to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 17, 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 35% on flights from Raleigh to St. Louis by exploring options for tickets in the afternoon.

How much does it cost to fly round-trip from Raleigh to St. Louis?

The best insider tips for Raleigh to St. Louis flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Raleigh to St. Louis trip
Our travel experts
John Walton

John Walton

Expert on RDU

Independent aviation journalist John Walton took his first flight at eight weeks old and hasn’t stopped travelling since. A world-renowned expert in airlines and the passenger experience, he writes in depth on aviation, is a resident expert on travel in Japan and France, and offers a uniquely queer perspective on travelling the world.

Read more
Taryn White

Taryn White

Expert on STL

Taryn White is a freelance travel writer, digital creator, and travel advisor who has visited nearly 100 countries and all 50 states. She’s familiar with many airports and enjoys beach hopping, boutique hotels, spa experiences, and exploring local culture. Her work has appeared in Travel + Leisure, Condé Nast Traveler, National Geographic, Smithsonian Magazine, AFAR, and more.

Read more

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated July 17, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited Airlines from Raleigh to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,241 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Southwest
8.0
Very good
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Delta
7.8
Good
8,474 reviews
Southwest
8.0
Very good
4,241 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
United Airlines
7.4
Good
9,997 reviews
Southwest
8.0
Very good
4,241 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
American Airlines
7.1
Good
11,818 reviews
Southwest
8.0
Very good
4,241 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Frontier
5.6
Fair
2,791 reviews
Southwest
8.0
Very good
4,241 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

Related info for your journey

Find useful and relevant information for your journey from Raleigh to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Raleigh to St. Louis?

    Booking a flight from Raleigh-Durham (RDU) to Lambert-St Louis (STL) is your only option if you wish to fly from Raleigh to St. Louis. On a typical day, there is 1 flight from Raleigh-Durham to Lambert-St Louis, all of which are around 2h 05m for a nonstop flight. You can also purchase a plane ticket from 5 airlines when you book a flight from Raleigh-Durham to St. Louis.

  • How popular is this Raleigh to St. Louis flight route?

    Within the past month, 17 users have taken a look at flights from Raleigh-Durham to Lambert-St Louis.

  • How long is the flight from Raleigh to St. Louis?

    A quick flight from Raleigh to St. Louis can take about 2h 05m. Southwest provides one of the quickest options available for as low as $297. The distance between Raleigh and St. Louis is about 666 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Raleigh to St. Louis round-trip?

    According to our current data, Frontier ($126), United Airlines ($180), and American Airlines ($204) offers the cheapest pricing from Raleigh to St. Louis. Frontier is priced at 68% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Raleigh to St. Louis one-way?

    The cheapest airlines for a one-way flight from Raleigh to St. Louis are Frontier ($56), American Airlines ($127), and Southwest ($134).

  • What are the cheapest flights from Raleigh to St. Louis?

    Looking for the cheapest flight from Raleigh to St. Louis? While on average our users pay $388, our data indicates the cheapest price to be $135. The most popular route (Raleigh-Durham - Lambert-St Louis), is priced around $174.

  • Can I find deals for flights from Raleigh to St. Louis that include hotel bookings?

    Yes. In addition to deals on Raleigh to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Raleigh to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Raleigh to St. Louis.

  • Can I find deals for business class flights from Raleigh to St. Louis?

    Yes. Cheapflights offers flight deals from Raleigh to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Raleigh to St. Louis?

    Currently, October is the cheapest month in which you can book a flight from Raleigh to St. Louis (average of $346). Flying from Raleigh to St. Louis in September is currently the most expensive (average of $473). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 5 airlines flying from Raleigh to St. Louis

Discover the top 5 airlines that operate flights from Raleigh to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$126Average$243FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$180Average$196FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$204Average$371FlexibilityNo cancel feeOn-time71%
DeltaCheapest$224Average$350FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$275Average$472FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.