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$53+ 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 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — STL
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
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

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

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Cheapflights Tip: The best prices from Raleigh-Durham to Lambert-St Louis are usually found in January or December, 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 October 29, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$119
(Mytrip)

One-way from

$53
(Trip.com)

Popular in

June

Cheapest in

January

Average price

$364

Good round-trip deal

$366 or less

Good one-way deal

$240 or less
Provider with most accurate pricing for Raleigh-Durham-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Raleigh-Durham-Lambert-St Louis flights.
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From Raleigh-Durham to Lambert-St Louis
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One-way flight from Raleigh-Durham to Lambert-St Louis
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Highest demand for flights based on searches. 3% potential increase in price ($15 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Raleigh-Durham to Lambert-St Louis.
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Price to beat on a one-way flight from Raleigh-Durham to Lambert-St Louis.
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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 October 29, 2025.

This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/188:00 amRDU - STL
1 stop27h 05mFrontier
Thu 11/203:14 pmSTL - RDU
1 stop7h 18mFrontier
Deal found 10/28$119
This Frontier deal was found by Cheapflights users on 10/28. 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 11/1510:45 amRDU - STL
1 stop5h 53mFrontier
Sun 11/1611:17 amSTL - RDU
1 stop10h 31mFrontier
Deal found 10/28$143
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Thu 12/412:53 pmRDU - STL
1 stop21h 54mFrontier
Mon 12/810:47 amSTL - RDU
1 stop12h 25mFrontier
Deal found 10/27$152
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 12/241:05 pmRDU - STL
1 stop21h 35mFrontier
Sun 12/2810:57 amSTL - RDU
1 stop24h 23mFrontier
Deal found 10/28$175
This Frontier deal was found by Cheapflights users on 10/27. 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.
Fri 11/146:10 amRDU - STL
1 stop10h 51mFrontier
Sun 11/1611:17 amSTL - RDU
1 stop10h 31mFrontier
Deal found 10/27$176
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 12/288:04 pmRDU - STL
1 stop27h 29mFrontier
Fri 1/910:42 amSTL - RDU
1 stop12h 30mFrontier
Deal found 10/28$182
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Thu 12/116:00 amRDU - STL
1 stop6h 07mFrontier
Thu 12/1810:42 amSTL - RDU
1 stop12h 31mFrontier
Deal found 10/27$186
This Booking.com deal was found by Cheapflights users on 10/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/75:21 pmRDU - STL
1 stop16h 46mFrontier
Sun 11/912:10 pmSTL - RDU
1 stop10h 45mFrontier
Deal found 10/28$188
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Thu 12/412:53 pmRDU - STL
1 stop21h 54mMultiple Airlines
Mon 12/87:43 pmSTL - RDU
2 stops13h 04mMultiple Airlines
Deal found 10/27$192
This Priceline deal was found by Cheapflights users on 10/27. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/66:10 amRDU - STL
1 stop5h 02mFrontier
Sun 11/912:10 pmSTL - RDU
1 stop10h 45mFrontier
Deal found 10/27$196

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 October 29, 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

Sat 11/15

6:00 am-9:07 am

2 stops28h 07m

Lambert-St Louis

Sat 11/22

9:52 am-7:44 pm

1 stop8h 52m

$272

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Mon 11/10

7:05 pm-9:07 am

2 stops39h 02m

Lambert-St Louis

Fri 11/14

4:56 pm-11:05 pm

1 stop5h 09m

$295

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 12/16

5:38 pm-11:42 pm

1 stop7h 04m

Lambert-St Louis

Tue 1/6

8:05 am-9:13 pm

2 stops12h 08m

$332

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Wed 11/26

12:15 pm-6:50 pm

1 stop7h 35m

Lambert-St Louis

Wed 12/3

8:20 am-11:10 am

Nonstop1h 50m

$368

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Sun 3/1

5:20 am-9:04 am

1 stop4h 44m

Lambert-St Louis

Tue 3/3

5:45 pm-11:06 pm

1 stop4h 21m

$398

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 1/13

10:00 am-2:30 pm

1 stop5h 30m

$129

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 12/11

6:10 am-12:15 pm

2 stops7h 05m

$134

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 12/25

6:00 am-2:26 pm

2 stops9h 26m

$134

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 1/27

6:00 am-2:30 pm

2 stops9h 30m

$134

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 1/29

3:02 pm-10:58 pm

2 stops8h 56m

$169

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 15 results
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 October.
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 October 24, 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 $138). 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 October 29, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 20% 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 October 26, 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.

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

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 October 29, 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
4,241 reviews

Crew

8.6

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
7,992 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
8,999 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
11,032 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
3,124 reviews
Southwest
8.0
Very good
4,241 reviews

Crew

8.6

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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 10m 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 7h 04m. Frontier provides one of the quickest options available for as low as $332. 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 Southwest ($239) 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 $388, our data indicates the cheapest price to be $154. The most popular route (Raleigh-Durham - Lambert-St Louis), is priced around $166.

  • 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 $138). 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

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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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$130Average$236FlexibilityNo cancel feeOn-time62%
DeltaCheapest$226Average$374FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$239Average$397FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$255Average$384FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$296Average$405FlexibilityNo cancel feeOn-time69%

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