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$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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — STL
Apr 27 — May 41
Mon 4/27
Mon 5/4
1 adult, Economy
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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

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Cheapflights Tip: The best prices from Raleigh-Durham to Lambert-St Louis are usually found in October or January, booked 83 days in advance, depart on a Wednesday or Tuesday and return on a Monday

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 March 28, 2026.

This Expedia deal was found by Cheapflights users on 3/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/712:26 pm
RDU
-
STL
1 stop7h 57m
Frontier
Mon 5/114:19 pm
STL
-
RDU
1 stop16h 02m
Frontier
Deal found 3/26$140
This Frontier deal was found by Cheapflights users on 3/25. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/255:51 pm
RDU
-
STL
1 stop6h 28m
Frontier
Mon 4/274:59 pm
STL
-
RDU
1 stop22h 57m
Frontier
Deal found 3/25$141
This CheapOair deal was found by Cheapflights users on 3/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/712:26 pm
RDU
-
STL
1 stop7h 57m
Frontier
Sat 5/98:08 pm
STL
-
RDU
1 stop14h 23m
Frontier
Deal found 3/27$151
This Priceline deal was found by Cheapflights users on 3/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:11 pm
RDU
-
STL
1 stop6h 08m
Frontier
Tue 5/56:41 pm
STL
-
RDU
1 stop4h 52m
Frontier
Deal found 3/24$160
This Priceline deal was found by Cheapflights users on 3/26. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1412:54 pm
RDU
-
STL
1 stop5h 00m
Frontier
Thu 5/216:33 pm
STL
-
RDU
1 stop4h 51m
Frontier
Deal found 3/26$165
This CheapOair deal was found by Cheapflights users on 3/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/166:10 am
RDU
-
STL
1 stop5h 20m
Frontier
Mon 4/204:59 pm
STL
-
RDU
1 stop18h 55m
Frontier
Deal found 3/27$171
This Kiwi.com deal was found by Cheapflights users on 3/27. 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 6/146:15 am
RDU
-
STL
1 stop27h 37m
Frontier
Wed 6/175:33 pm
STL
-
RDU
1 stop17h 26m
Frontier
Deal found 3/27$175
This CheapOair deal was found by Cheapflights users on 3/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2112:26 pm
RDU
-
STL
1 stop7h 57m
Frontier
Mon 5/254:19 pm
STL
-
RDU
1 stop16h 02m
Frontier
Deal found 3/25$176
This Expedia deal was found by Cheapflights users on 3/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2910:54 am
RDU
-
STL
1 stop13h 25m
Frontier
Thu 4/3011:21 am
STL
-
RDU
1 stop10h 59m
Frontier
Deal found 3/27$180
This Frontier deal was found by Cheapflights users on 3/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/236:10 am
RDU
-
STL
1 stop5h 20m
Frontier
Sun 4/2611:44 am
STL
-
RDU
1 stop10h 11m
Frontier
Deal found 3/27$181
This Expedia deal was found by Cheapflights users on 3/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/52:08 pm
RDU
-
STL
1 stop10h 17m
Frontier
Sat 4/188:23 pm
STL
-
RDU
1 stop11h 00m
Frontier
Deal found 3/26$185
This Kiwi.com deal was found by Cheapflights users on 3/25. 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 4/226:11 pm
RDU
-
STL
2 stops17h 19m
Frontier
Wed 4/298:23 pm
STL
-
RDU
1 stop11h 00m
Frontier
Deal found 3/25$186

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 March 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$140
(Expedia)

One-way from

$70
(Priceline)

Popular in

September

Cheapest in

October

Average price

$411

Good round-trip deal

$401 or less

Good one-way deal

$195 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
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 28, 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

Wed 4/29

5:40 am-1:00 pm

2 stops8h 20m

Lambert-St Louis

Tue 5/5

2:10 pm-9:35 pm

2 stops6h 25m

$241

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Mon 4/27

7:10 pm-11:55 pm

1 stop5h 45m

Lambert-St Louis

Wed 4/29

1:15 pm-6:15 pm

1 stop4h 00m

$253

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 5/7

6:25 am-7:35 am

Nonstop2h 10m

Lambert-St Louis

Mon 5/11

4:00 pm-11:10 pm

1 stop6h 10m

$302

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 4/23

4:50 pm-11:25 pm

1 stop7h 35m

Lambert-St Louis

Sat 4/25

12:25 pm-3:15 pm

Nonstop1h 50m

$317

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 5/29

7:50 pm-11:25 pm

1 stop4h 35m

Lambert-St Louis

Fri 6/5

2:55 pm-1:00 am

2 stops9h 05m

$326
Quickest round-trip

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Wed 4/15

6:10 am-7:20 am

Nonstop2h 10m

Lambert-St Louis

Sun 4/19

5:25 am-10:30 am

1 stop4h 05m

$328

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 6/5

5:40 pm-11:10 pm

1 stop6h 30m

Lambert-St Louis

Mon 6/8

7:55 pm-10:45 pm

Nonstop1h 50m

$340
Cheapest one-way

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Wed 6/10

1:15 pm-6:00 pm

1 stop5h 45m

$116

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 4/21

3:50 pm-10:10 pm

2 stops7h 20m

$121

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 4/14

3:50 pm-10:10 pm

2 stops7h 20m

$121

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

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 March.
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?

Use this chart to determine the optimal time to book a round-trip flight from Raleigh to St. Louis. Price data was last updated on March 13, 2026.

Booking 68 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, July is the cheapest month in which you can book a flight from Raleigh to St. Louis (average of $196). Flying from Raleigh to St. Louis in March is currently the most expensive (average of $235). 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 March 28, 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 29% 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 March 28, 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
4,333 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,333 reviews
Southwest
8.0
Very good
4,333 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,356 reviews
Southwest
8.0
Very good
4,333 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,499 reviews
Southwest
8.0
Very good
4,333 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,520 reviews
Southwest
8.0
Very good
4,333 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
3,013 reviews
Southwest
8.0
Very good
4,333 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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, 21 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 8h 20m. Southwest provides one of the quickest options available for as low as $241. The distance between Raleigh and St. Louis is about 666 mi.

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

    According to our current data, Frontier ($149), United Airlines ($180), and American Airlines ($212) offers the cheapest pricing from Raleigh to St. Louis. Frontier is priced at 61% 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 ($55), American Airlines ($128), and Southwest ($128).

  • 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 $401, our data indicates the cheapest price to be $108. The most popular route (Raleigh-Durham - Lambert-St Louis), is priced around $204.

  • 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, July is the cheapest month in which you can book a flight from Raleigh to St. Louis (average of $196). Flying from Raleigh to St. Louis in March is currently the most expensive (average of $235). 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
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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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 March 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$149Average$247FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$180Average$196FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$212Average$384FlexibilityNo cancel feeOn-time71%
DeltaCheapest$226Average$384FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$268Average$426FlexibilityNo cancel feeOn-time63%

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