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

$55+ 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — STL
Dec 12 — Dec 191
Fri 12/12
Fri 12/19
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 January or October, booked 67 days in advance, depart on a Wednesday or Monday and return on a Monday

Cheap 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 November 12, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$110
(Frontier)

One-way from

$55
(Priceline)

Popular in

June

Cheapest in

January

Average price

$374

Good round-trip deal

$339 or less

Good one-way deal

$263 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. 3% potential increase in price ($14 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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

Find 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 November 12, 2025.

This Frontier deal was found by Cheapflights users on 11/11. 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.
Mon 12/86:10 amRDU - STL
1 stop4h 42mFrontier
Thu 12/1112:04 pmSTL - RDU
1 stop11h 08mFrontier
Deal found 11/11$110
This Expedia deal was found by Cheapflights users on 11/11. 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 12/46:00 amRDU - STL
1 stop6h 07mFrontier
Fri 12/53:30 pmSTL - RDU
1 stop24h 14mFrontier
Deal found 11/11$124
This Expedia deal was found by Cheapflights users on 11/11. 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.
Mon 12/17:37 pmRDU - STL
1 stop27h 56mFrontier
Thu 12/412:04 pmSTL - RDU
1 stop11h 08mFrontier
Deal found 11/11$127
This Expedia deal was found by Cheapflights users on 11/9. 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.
Fri 12/128:14 pmRDU - STL
1 stop27h 19mFrontier
Wed 12/173:30 pmSTL - RDU
1 stop25h 58mFrontier
Deal found 11/9$128
This Kiwi.com deal was found by Cheapflights users on 11/10. 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 12/116:00 amRDU - STL
1 stop6h 07mFrontier
Mon 12/1510:47 amSTL - RDU
1 stop12h 25mFrontier
Deal found 11/10$162
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 12/46:00 amRDU - STL
1 stop6h 07mFrontier
Sun 12/710:42 amSTL - RDU
1 stop12h 30mFrontier
Deal found 11/11$167
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 12/46:00 amRDU - STL
1 stop6h 07mFrontier
Mon 12/810:47 amSTL - RDU
1 stop12h 25mFrontier
Deal found 11/11$170
This Kiwi.com deal was found by Cheapflights users on 11/10. 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 12/116:00 amRDU - STL
1 stop6h 07mFrontier
Sat 12/137:43 pmSTL - RDU
2 stops15h 25mFrontier
Deal found 11/10$180
This Priceline deal was found by Cheapflights users on 11/10. 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.
Mon 12/86:10 amRDU - STL
1 stop4h 42mFrontier
Fri 12/129:54 amSTL - RDU
1 stop5h 50mFrontier
Deal found 11/10$186
This CheapOair deal was found by Cheapflights users on 11/12. 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.
Tue 12/168:14 pmRDU - STL
1 stop27h 19mFrontier
Tue 1/65:11 pmSTL - RDU
1 stop22h 41mFrontier
Deal found 11/12$189

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 November 12, 2025.
Use the filters below to find and compare flights from Raleigh to St. Louis that are best for you.

Fly from

Raleigh

Fly to

St. Louis

Route

Depart

Return

Price

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 12/16

8:14 pm-10:33 pm

1 stop27h 19m

Lambert-St Louis

Tue 1/6

5:11 pm-4:52 pm

1 stop22h 41m

$189

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 12/2

8:15 am-10:33 pm

2 stops15h 18m

Lambert-St Louis

Fri 12/5

10:42 am-12:12 am

1 stop12h 30m

$220

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 12/16

6:15 am-10:45 am

1 stop5h 30m

Lambert-St Louis

Tue 1/6

9:59 am-3:55 pm

1 stop4h 56m

$227

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 12/23

8:14 pm-10:33 pm

1 stop27h 19m

Lambert-St Louis

Mon 12/29

10:40 am-8:14 am

1 stop20h 34m

$261

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Mon 12/8

5:15 am-8:24 am

1 stop4h 09m

Lambert-St Louis

Wed 12/10

6:00 am-11:37 am

1 stop4h 37m

$262

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Sun 3/1

5:30 am-9:38 am

1 stop5h 08m

Lambert-St Louis

Tue 3/3

10:18 am-4:11 pm

1 stop4h 53m

$280

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 1/29

12:12 pm-5:50 pm

1 stop6h 38m

Lambert-St Louis

Sun 2/1

6:35 am-12:18 pm

1 stop4h 43m

$289

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 12/16

11:10 am-5:15 pm

2 stops7h 05m

Lambert-St Louis

Wed 12/17

10:15 am-8:10 pm

2 stops8h 55m

$329

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 12/16

10:02 am-4:06 pm

1 stop7h 04m

Lambert-St Louis

Fri 12/19

6:00 am-1:06 pm

1 stop6h 06m

$337

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Sat 12/6

11:30 am-12:40 pm

Nonstop2h 10m

Lambert-St Louis

Sat 12/13

4:30 pm-7:15 pm

Nonstop1h 45m

$341

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

Showing 1-10 of 22 results
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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice 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 CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Raleigh-St. Louis flight deals on Cheapflights vs. CheapOair >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 CheapOair the most. CheapOair 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 November 7, 2025.

Booking 67 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, January is the cheapest month in which you can book a flight from Raleigh to St. Louis (average of $137). Flying from Raleigh to St. Louis in March is currently the most expensive (average of $257). 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 November 12, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 24% on flights from Raleigh to St. Louis by exploring options for tickets in the afternoon.

What is the cheapest day to fly from Raleigh to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Raleigh to St. Louis. Price data was last updated on November 2, 2025.

Travelers seeking maximum savings on their Raleigh to St. Louis flight should consider departing on Monday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

The best insider tips for Raleigh to St. Louis flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Raleigh to St. Louis trip
Airports
RDU

RDU's compact layout makes it easy to navigate, with two terminals connected by a central parking garage tunnel.

Read more about RDUby John Walton
STL

Use the MetroLink light rail for a convenient and economical way to reach downtown St. Louis from STL.

Read more about STLby Taryn White
Our travel experts
John Walton

John Walton

Expert on RDU

John Walton

John Walton

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

Taryn White

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 November 12, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United 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
4,235 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,235 reviews
Southwest
8.0
Very good
4,235 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
8,009 reviews
Southwest
8.0
Very good
4,235 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
9,015 reviews
Southwest
8.0
Very good
4,235 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,049 reviews
Southwest
8.0
Very good
4,235 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,114 reviews
Southwest
8.0
Very good
4,235 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 15m 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, 33 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 5h 30m. Frontier provides one of the quickest options available for as low as $227. 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 ($130), Delta ($226), and American Airlines ($252) offers the cheapest pricing from Raleigh to St. Louis. Frontier is priced at 66% lower than the current average price of a flight leaving 3 months from now.

  • 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 $391, our data indicates the cheapest price to be $154. The most popular route (Raleigh-Durham - Lambert-St Louis), is priced around $152.

  • 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, January is the cheapest month in which you can book a flight from Raleigh to St. Louis (average of $137). Flying from Raleigh to St. Louis in March is currently the most expensive (average of $257). 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
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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.

Alternative routes for Raleigh to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Raleigh to Kansas City flights
Charlotte to St. Louis flights
Charlotte to Kansas City flights
Charlotte to Springfield flights
Wilmington to Kansas City flights
Knoxville to Kansas City flights
Greensboro to Kansas City flights
Greensboro to St. Louis flights
Norfolk to St. Louis flights
Knoxville to St. Louis flights
Norfolk to Kansas City flights
Asheville to St. Louis flights
Asheville to Kansas City flights
Asheville to Springfield flights
Raleigh to Springfield flights
Myrtle Beach to Springfield flights
Myrtle Beach to St. Louis flights
Wilmington to Springfield flights
Wilmington to St. Louis flights
Norfolk to Springfield flights
Jacksonville to Kansas City flights
Knoxville to Springfield flights
Blountville to St. Louis flights
Myrtle Beach to Kansas City flights
Fayetteville to St. Louis flights
Blountville to Kansas City flights
Raleigh to Joplin flights
Charlotte to Joplin flights
Knoxville to Joplin flights
Norfolk to Columbia flights
Fayetteville to Kansas City flights
Greensboro to Joplin flights
New Bern to Kansas City flights
Blountville to Springfield flights
Charlotte to Columbia flights
Greensboro to Columbia flights
New Bern to St. Louis flights
Jacksonville to Springfield flights
Fayetteville to Springfield flights
Myrtle Beach to Joplin flights
Raleigh to Columbia flights
Norfolk to Fort Leonard Wood flights
Norfolk to Joplin flights
Charlotte to Fort Leonard Wood flights
Greensboro to Fort Leonard Wood flights
Raleigh to Fort Leonard Wood flights
Norfolk to Cape Girardeau flights
Norfolk to Branson flights
Wilmington to Quincy flights

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 November 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$130Average$236FlexibilityNo cancel feeOn-time62%
DeltaCheapest$226Average$374FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$252Average$384FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$271Average$400FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$296Average$405FlexibilityNo cancel feeOn-time69%

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.