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$73+ 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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — STL
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheapflights Tip: The best prices from Raleigh-Durham to Lambert-St Louis are usually found in August or September, booked 71 days in advance, depart on a Wednesday or Tuesday 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 August 18, 2025.

Round-trip from

$160
(FlightHub)

One-way from

$73
(Priceline)

Popular in

June

Cheapest in

August

Average price

$334

Good round-trip deal

$253 or less

Good one-way deal

$154 or less
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. 7% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 18, 2025.

This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/29:02 pmRDU - STL
1 stop24h 35mFrontier
Sun 10/54:00 pmSTL - RDU
1 stop5h 50mFrontier
Deal found 8/17$160
This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:10 pmRDU - STL
1 stop17h 12mFrontier
Sat 10/184:33 pmSTL - RDU
1 stop16h 12mFrontier
Deal found 8/17$163
This FlightHub deal was found by Cheapflights users on 8/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:22 amRDU - STL
1 stop9h 42mFrontier
Mon 9/154:00 pmSTL - RDU
1 stop5h 58mFrontier
Deal found 8/18$165
This FlightHub deal was found by Cheapflights users on 8/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/55:23 pmRDU - STL
1 stop16h 43mFrontier
Mon 9/84:00 pmSTL - RDU
1 stop5h 58mFrontier
Deal found 8/16$168
This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/125:23 pmRDU - STL
1 stop16h 43mFrontier
Sun 9/1410:39 amSTL - RDU
1 stop22h 24mFrontier
Deal found 8/17$171
This FlightHub deal was found by Cheapflights users on 8/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/59:02 pmRDU - STL
1 stop24h 35mFrontier
Fri 10/1011:32 amSTL - RDU
1 stop5h 48mFrontier
Deal found 8/15$182
This Frontier deal was found by Cheapflights users on 8/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:22 amRDU - STL
1 stop9h 42mFrontier
Thu 9/1810:49 amSTL - RDU
2 stops11h 01mFrontier
Deal found 8/17$186
This Frontier deal was found by Cheapflights users on 8/16. 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 9/186:22 amRDU - STL
1 stop9h 42mFrontier
Sun 9/2110:39 amSTL - RDU
2 stops22h 14mFrontier
Deal found 8/16$188
This Frontier deal was found by Cheapflights users on 8/18. 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 9/1212:21 pmRDU - STL
2 stops21h 45mFrontier
Mon 9/154:00 pmSTL - RDU
1 stop5h 58mFrontier
Deal found 8/18$197
This FlightHub deal was found by Cheapflights users on 8/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/139:09 amRDU - STL
1 stop25h 53mMultiple Airlines
Mon 10/206:05 pmSTL - RDU
1 stop16h 25mMultiple Airlines
Deal found 8/18$199
This Frontier deal was found by Cheapflights users on 8/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/246:10 amRDU - STL
2 stops7h 57mFrontier
Mon 8/252:01 pmSTL - RDU
1 stop7h 27mFrontier
Deal found 8/17$201

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 August 18, 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

Thu 10/2

9:02 pm-8:37 pm

1 stop24h 35m

Lambert-St Louis

Sun 10/5

4:00 pm-10:50 pm

1 stop5h 50m

$160

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 10/17

6:15 am-10:37 am

1 stop5h 22m

Lambert-St Louis

Sun 10/19

11:32 am-10:59 pm

1 stop10h 27m

$163

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 9/11

6:22 am-3:04 pm

1 stop9h 42m

Lambert-St Louis

Thu 9/18

4:00 pm-10:50 pm

1 stop5h 50m

$163

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Mon 9/29

6:22 am-3:04 pm

1 stop9h 42m

Lambert-St Louis

Thu 10/2

4:00 pm-10:50 pm

1 stop5h 50m

$163

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 9/18

6:22 am-3:04 pm

1 stop9h 42m

Lambert-St Louis

Sun 9/21

10:39 am-10:03 am

1 stop22h 24m

$163

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Sat 10/11

5:10 pm-9:22 am

1 stop17h 12m

Lambert-St Louis

Sat 10/18

4:33 pm-9:45 am

1 stop16h 12m

$163

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 9/5

5:23 pm-9:06 am

1 stop16h 43m

Lambert-St Louis

Sun 9/7

4:00 pm-10:50 pm

1 stop5h 50m

$168

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 9/19

5:23 pm-9:06 am

1 stop16h 43m

Lambert-St Louis

Sun 9/21

4:00 pm-5:38 pm

1 stop24h 38m

$168

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 10/30

6:10 am-10:12 am

1 stop5h 02m

$73

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Sun 10/12

6:15 am-10:37 am

1 stop5h 22m

$73

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 17 results
1
2

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

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 August 8, 2025.

Booking 51 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, August is the cheapest month in which you can book a flight from Raleigh to St. Louis (average of $311). Flying from Raleigh to St. Louis in March is currently the most expensive (average of $356). 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 August 18, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 21% 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 August 10, 2025.

Travelers seeking maximum savings on their Raleigh to St. Louis flight should consider departing on Monday at noon 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.

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 August 18, 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
4,246 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,925 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,212 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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, 26 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 24h 35m. Frontier provides one of the quickest options available for as low as $160. 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 ($130), Southwest ($184), and Delta ($226) offers the cheapest pricing from Raleigh to St. Louis. Frontier is priced at 65% 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 $287, our data indicates the cheapest price to be $97. The most popular route (Raleigh-Durham - Lambert-St Louis), is priced around $186.

  • 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, August is the cheapest month in which you can book a flight from Raleigh to St. Louis (average of $311). Flying from Raleigh to St. Louis in March is currently the most expensive (average of $356). 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
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Farmington
Festus

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Alternative routes for Raleigh to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$130Average$228FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$184Average$380FlexibilityNo cancel feeOn-time63%
DeltaCheapest$226Average$374FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$260Average$374FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$296Average$369FlexibilityNo cancel feeOn-time69%

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