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$65+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — STL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Raleigh-Durham to Lambert-St Louis are usually found in July or August, booked 71 days in advance, depart on a Wednesday or Thursday 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 June 12, 2025.

Round-trip from

$139
(FlightHub)

One-way from

$65
(FlightHub)

Popular in

February

Cheapest in

July

Average price

$358

Good round-trip deal

$308 or less

Good one-way deal

$173 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. 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 ($2 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/710:36 amRDU - STL
1 stop8h 42mSpirit Airlines
Thu 7/1710:47 amSTL - RDU
1 stop4h 25mSpirit Airlines
Deal found 6/11$139
This Booking.com deal was found by Cheapflights users on 6/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1812:51 pmRDU - STL
1 stop11h 56mMultiple Airlines
Sun 7/2010:47 amSTL - RDU
1 stop4h 25mMultiple Airlines
Deal found 6/9$207
This Southwest deal was found by Cheapflights users on 6/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/78:05 amRDU - STL
Nonstop2h 05mSouthwest
Mon 8/117:50 amSTL - RDU
Nonstop1h 55mSouthwest
Deal found 6/12$257
This FlightHub deal was found by Cheapflights users on 6/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/85:07 pmRDU - STL
1 stop21h 52mFrontier
Sun 8/102:36 pmSTL - RDU
1 stop24h 36mFrontier
Deal found 6/12$269
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/306:25 amRDU - STL
1 stop7h 58mAmerican Airlines
Sat 10/49:57 amSTL - RDU
1 stop5h 29mAmerican Airlines
Deal found 6/11$270
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1110:30 amRDU - STL
1 stop5h 06mDelta
Sat 10/187:20 amSTL - RDU
1 stop5h 47mDelta
Deal found 6/11$297
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/16:30 amRDU - STL
1 stop5h 10mUnited Airlines
Tue 9/26:35 amSTL - RDU
2 stops6h 35mUnited Airlines
Deal found 6/10$304

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 June 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

Mon 7/7

10:36 am-6:18 pm

1 stop8h 42m

Lambert-St Louis

Thu 7/17

10:47 am-4:12 pm

1 stop4h 25m

$139

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 7/18

12:51 pm-11:47 pm

1 stop11h 56m

Lambert-St Louis

Sun 7/20

10:47 am-4:12 pm

1 stop4h 25m

$207

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 8/7

8:05 am-9:10 am

Nonstop2h 05m

Lambert-St Louis

Mon 8/11

7:50 am-10:45 am

Nonstop1h 55m

$257

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 8/8

5:07 pm-1:59 pm

1 stop21h 52m

Lambert-St Louis

Sun 8/10

2:36 pm-4:12 pm

1 stop24h 36m

$269

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Mon 9/1

6:30 am-10:40 am

1 stop5h 10m

Lambert-St Louis

Tue 9/2

6:35 am-2:10 pm

2 stops6h 35m

$304

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Mon 7/14

3:45 pm-9:05 pm

1 stop6h 20m

Lambert-St Louis

Tue 7/15

12:41 pm-5:30 pm

1 stop3h 49m

$369

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 7/4

10:36 am-5:04 pm

1 stop7h 28m

$65

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Tue 9/9

6:25 am-1:23 pm

1 stop7h 58m

$127

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Wed 9/10

8:30 am-9:35 am

Nonstop2h 05m

$129

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Sun 6/22

12:59 pm-7:24 pm

1 stop7h 25m

$130

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 13 results
1
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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 June 9, 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 June 12, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 19% 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 June 8, 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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 June 12, 2025.
Read through reviews of airlines operating flights from Raleigh to St. Louis, such as Southwest, Delta and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,946 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Spirit Airlines
6.3
Okay
8,052 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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, 22 users have taken a look at flights from Raleigh-Durham to Lambert-St Louis.

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

    According to our current data, Spirit Airlines ($139), Southwest ($257), and Frontier ($269) offers the cheapest pricing from Raleigh to St. Louis. Spirit Airlines 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 Spirit Airlines ($65), American Airlines ($127), and Southwest ($129).

  • 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 $282, our data indicates the cheapest price to be $119. The most popular route (Raleigh-Durham - Lambert-St Louis), is priced around $146.

  • 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 Raleigh?

Book flights to Raleigh if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Festus
Alton
Farmington

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$130Average$170FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$176Average$375FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$229Average$350FlexibilityNo cancel feeOn-time71%
DeltaCheapest$248Average$374FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$296Average$364FlexibilityNo cancel feeOn-time69%

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