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Cheap flights from Raleigh to St. Louis from $72

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Raleigh to St. Louis departing on 10/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Raleigh to St. Louis (RDU-STL)

Cheap round-trip flights

Frontier Logo
6:22 am - 3:04 pmRDU-STL
9h 42m1 stop
Frontier Logo
4:00 pm - 10:50 pmSTL-RDU
5h 50m1 stop
$144Frontier
Find Deal
Thu, Sep 4 - Sun, Sep 7
Frontier Logo
5:23 pm - 9:06 amRDU-STL
16h 43m1 stop
Frontier Logo
4:00 pm - 10:58 pmSTL-RDU
5h 58m1 stop
$151Frontier
Find Deal
Fri, Sep 5 - Mon, Sep 8
Frontier Logo
5:23 pm - 9:06 amRDU-STL
16h 43m1 stop
Frontier Logo
1:52 pm - 9:53 amSTL-RDU
19h 01m1 stop
$153Frontier
Find Deal
Fri, Sep 12 - Sun, Sep 14
Frontier Logo
5:23 pm - 9:06 amRDU-STL
16h 43m1 stop
Frontier Logo
1:52 pm - 9:53 amSTL-RDU
19h 01m1 stop
$154Frontier
Find Deal
Fri, Sep 12 - Sun, Sep 14
Frontier Logo
5:23 pm - 9:06 amRDU-STL
16h 43m1 stop
Frontier Logo
4:00 pm - 10:50 pmSTL-RDU
5h 50m1 stop
$157Frontier
Find Deal
Fri, Oct 3 - Sun, Oct 5
Frontier Logo
6:10 am - 10:12 amRDU-STL
5h 02m1 stop
Frontier Logo
11:17 am - 10:48 pmSTL-RDU
10h 31m1 stop
$161Frontier
Find Deal
Thu, Nov 13 - Sun, Nov 16
Frontier Logo
6:22 am - 3:04 pmRDU-STL
9h 42m1 stop
Frontier Logo
1:52 pm - 9:53 amSTL-RDU
19h 01m1 stop
$165Frontier
Find Deal
Thu, Sep 11 - Sun, Sep 14
Frontier Logo
12:21 pm - 8:37 pmRDU-STL
9h 16m1 stop
Frontier Logo
4:00 pm - 10:50 pmSTL-RDU
5h 50m1 stop
$172Frontier
Find Deal
Fri, Oct 3 - Sun, Oct 5
Logo
6:15 am - 10:37 amRDU-STL
5h 22m1 stop
Logo
10:57 am - 2:20 pmSTL-RDU
26h 23m1 stop
$190
Find Deal
Fri, Oct 17 - Sun, Oct 19
Logo
9:09 am - 10:02 amRDU-STL
25h 53m1 stop
Logo
6:05 pm - 11:30 amSTL-RDU
16h 25m1 stop
$195
Find Deal
Mon, Oct 13 - Mon, Oct 20

Frontier flights from Raleigh to St. Louis

Our best Frontier deals on Raleigh to St. Louis flight tickets
Frontier
Sep 4
RDU6:22 amRaleigh-Durham
9h 42m
1 stop
STL3:04 pmLambert-St Louis
Sep 7
STL4:00 pmLambert-St Louis
5h 50m
1 stop
RDU10:50 pmRaleigh-Durham
$144
Find similar
Frontier
Sep 5
RDU5:23 pmRaleigh-Durham
16h 43m
1 stop
STL9:06 amLambert-St Louis
Sep 8
STL4:00 pmLambert-St Louis
5h 58m
1 stop
RDU10:58 pmRaleigh-Durham
$151
Find similar
Frontier
Sep 12
RDU5:23 pmRaleigh-Durham
16h 43m
1 stop
STL9:06 amLambert-St Louis
Sep 14
STL1:52 pmLambert-St Louis
19h 01m
1 stop
RDU9:53 amRaleigh-Durham
$153
Find similar

American Airlines flights from Raleigh to St. Louis

Our best American Airlines deals on Raleigh to St. Louis flight tickets
American Airlines
Sep 6
RDU7:27 amRaleigh-Durham
9h 48m
1 stop
STL4:15 pmLambert-St Louis
Sep 20
STL6:29 amLambert-St Louis
3h 49m
1 stop
RDU11:18 amRaleigh-Durham
$362
Find similar
American Airlines
Sep 3
RDU5:49 amRaleigh-Durham
8h 02m
1 stop
STL12:51 pmLambert-St Louis
Sep 5
STL6:00 amLambert-St Louis
8h 02m
1 stop
RDU3:02 pmRaleigh-Durham
$421
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated August 28, 2025.
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

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 9/4

6:22 am-3:04 pm

1 stop9h 42m

Lambert-St Louis

Sun 9/7

4:00 pm-10:50 pm

1 stop5h 50m

$144

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 9/5

5:23 pm-9:06 am

1 stop16h 43m

Lambert-St Louis

Mon 9/8

4:00 pm-10:58 pm

1 stop5h 58m

$151

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 9/12

5:23 pm-9:06 am

1 stop16h 43m

Lambert-St Louis

Sun 9/14

1:52 pm-9:53 am

1 stop19h 01m

$153

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 9/12

5:23 pm-9:06 am

1 stop16h 43m

Lambert-St Louis

Sun 9/14

1:52 pm-9:53 am

1 stop19h 01m

$154

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 10/3

5:23 pm-9:06 am

1 stop16h 43m

Lambert-St Louis

Sun 10/5

4:00 pm-10:50 pm

1 stop5h 50m

$157

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 11/13

6:10 am-10:12 am

1 stop5h 02m

Lambert-St Louis

Sun 11/16

11:17 am-10:48 pm

1 stop10h 31m

$161

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Thu 9/11

6:22 am-3:04 pm

1 stop9h 42m

Lambert-St Louis

Sun 9/14

1:52 pm-9:53 am

1 stop19h 01m

$165

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Fri 10/3

12:21 pm-8:37 pm

1 stop9h 16m

Lambert-St Louis

Sun 10/5

4:00 pm-10:50 pm

1 stop5h 50m

$172

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

10:57 am-2:20 pm

1 stop26h 23m

$190

RaleighSt. Louis

RDU - STL

RDUSTL

Raleigh-Durham

Mon 10/13

9:09 am-10:02 am

1 stop25h 53m

Lambert-St Louis

Mon 10/20

6:05 pm-11:30 am

1 stop16h 25m

$195

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Raleigh to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to St. Louis?

In general, August is the cheapest month to fly from Raleigh to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $334. The month of September is another great option to travel to St. Louis, with average flight prices from Raleigh averaging around $334.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $347. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $435. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Raleigh in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $326 when looking at flights departing in the afternoon. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $411 per ticket.

What is the cheapest Raleigh-Durham to Lambert-St Louis flight route?

Fly from Raleigh-Durham to Lambert-St Louis for the best Raleigh-Durham - Lambert-St Louis flight prices

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Raleigh when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $373 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Raleigh for as low as $287 on momondo.

What cabin class options are available on Raleigh-Durham to Lambert-St Louis flights?

There is only 1 cabin class available to choose from on Raleigh-Durham to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Raleigh to St. Louis flights?

No. A direct flight is the cheapest option for a flight between Raleigh to St. Louis.

How have Raleigh to St. Louis flight prices changed over time?

As of August 2025, prices for Raleigh to St. Louis flights are approximately 77% more expensive when compared to flights at the same time last year.

When to book flights from Raleigh to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Raleigh to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Raleigh to St. Louis (RDU to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Raleigh to St. Louis

Best Price Found

$153

Fastest flight time

2h 05m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Raleigh in the past 72 hours is $153. The best round-trip flight deal from Raleigh to St. Louis found on momondo in the last 72 hours is $266.
The fastest flight from Raleigh to St. Louis takes 2h 05m
Direct flights go from Raleigh to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

  • How far is Raleigh-Durham to Lambert-St Louis by plane?

    Lambert-St Louis is 665.0 mi away from Raleigh-Durham. 5h 02m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Raleigh-Durham Airport to Lambert-St Louis Airport?

    Prices for flights from Raleigh-Durham Airport to Lambert-St Louis Airport are updated daily.

  • How many operators does momondo search for flights from Raleigh-Durham Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Raleigh-Durham Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Raleigh-Durham Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Raleigh to St. Louis?

  • What is the most popular airline from Raleigh to St. Louis?

Best airlines flying from Raleigh to St. Louis

Compare and see reviews for airlines that fly from Raleigh to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $130Free CancellationRating
5.8
3,204 reviews
Search Frontier flights
SouthwestPriceFrom $184Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
DeltaPriceFrom $226Free CancellationRating
7.9
7,977 reviews
Search Delta flights
American AirlinesPriceFrom $246Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $296Free CancellationRating
7.4
8,944 reviews
Search United Airlines flights

  • Southwest Flights From Raleigh to St. Louis

    Across 10 Southwest flights from Raleigh to St. Louis this week, the average price was $385, with the best Southwest deals starting from $184 round-trip. 4,242 users have rated Southwest on momondo, with an average score of 8.0/10.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
O'Fallon
Fenton
Collinsville
Wentzville
Alton
St. Peters
Farmington
Festus
Glencoe
Clayton
Edwardsville
Eureka
Litchfield
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Raleigh to St. Louis?

It is quick and easy to find Raleigh to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

Can I find flights from Raleigh to St. Louis with flexible booking policies on momondo?

Flights from Raleigh to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Raleigh to St. Louis?

momondo helps you find the best flight between Raleigh and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Raleigh to St. Louis right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Raleigh to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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