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Cheap flights from the United States to St. Louis from $28

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to St. Louis departing on 11/24. 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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Find the cheapest flights from the United States to St. Louis

Recent round-trip flight deals from the United States to St. Louis

Enter your travel dates to find the best prices.
Frontier Logo
7:05 am - 10:14 amDEN-STL
2h 09mnonstop
Frontier Logo
7:43 pm - 9:15 pmSTL-DEN
2h 32mnonstop
$93Frontier
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Sat, Dec 13 - Mon, Dec 15
Frontier Logo
6:50 am - 10:02 amDEN-STL
2h 12mnonstop
Frontier Logo
7:43 pm - 9:17 pmSTL-DEN
2h 34mnonstop
$97Frontier
Find Deal
Fri, Nov 21 - Sat, Nov 22
Southwest Logo
6:05 am - 7:30 amICT-STL
1h 25mnonstop
Southwest Logo
8:40 pm - 10:05 pmSTL-ICT
1h 25mnonstop
$117Southwest
Find Deal
Wed, Dec 3 - Wed, Dec 10
Southwest Logo
4:05 pm - 5:25 pmICT-STL
1h 20mnonstop
Southwest Logo
1:45 pm - 7:20 pmSTL-ICT
5h 35m1 stop
$127Southwest
Find Deal
Wed, Dec 3 - Wed, Dec 10
American Airlines Logo
5:48 pm - 7:30 pmDFW-STL
1h 42mnonstop
American Airlines Logo
7:00 am - 9:16 amSTL-DFW
2h 16mnonstop
$149American Airlines
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Tue, Dec 2 - Tue, Dec 9
Delta Logo
5:19 pm - 9:57 pmICT-STL
4h 38m1 stop
Delta Logo
12:49 pm - 8:08 pmSTL-ICT
7h 19m1 stop
$157Delta
Find Deal
Wed, Dec 3 - Wed, Dec 17
American Airlines Logo
8:49 am - 10:36 amDFW-STL
1h 47mnonstop
American Airlines Logo
1:20 pm - 3:22 pmSTL-DFW
2h 02mnonstop
$159American Airlines
Find Deal
Wed, Dec 17 - Wed, Dec 17
Delta Logo
7:38 am - 12:04 pmICT-STL
4h 26m1 stop
Delta Logo
6:00 am - 11:03 amSTL-ICT
5h 03m1 stop
$169Delta
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Tue, Dec 9 - Thu, Dec 11
United Airlines Logo
3:00 pm - 10:00 pmICT-STL
7h 00m1 stop
United Airlines Logo
2:45 pm - 8:29 pmSTL-ICT
5h 44m1 stop
$191United Airlines
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Wed, Jan 14 - Mon, Jan 19
United Airlines Logo
9:14 am - 4:28 pmICT-STL
7h 14m1 stop
United Airlines Logo
5:27 pm - 10:16 pmSTL-ICT
4h 49m1 stop
$193United Airlines
Find Deal
Thu, Dec 11 - Fri, Dec 12

Delta flights from United States to St. Louis

Our best Delta deals on United States to St. Louis flight tickets
Delta
Dec 3
ICT5:19 pmWichita Eisenhower National
4h 38m
1 stop
STL9:57 pmLambert-St Louis
Dec 17
STL12:49 pmLambert-St Louis
7h 19m
1 stop
ICT8:08 pmWichita Eisenhower National
$157
Find similar
Delta
Dec 9
ICT7:38 amWichita Eisenhower National
4h 26m
1 stop
STL12:04 pmLambert-St Louis
Dec 11
STL6:00 amLambert-St Louis
5h 03m
1 stop
ICT11:03 amWichita Eisenhower National
$169
Find similar
Delta
Dec 17
IAD7:01 amWashington, D.C. Dulles Intl
4h 44m
1 stop
STL10:45 amLambert-St Louis
Jan 14
STL6:35 amLambert-St Louis
4h 12m
1 stop
IAD11:47 amWashington, D.C. Dulles Intl
$237
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United Airlines flights from United States to St. Louis

Our best United Airlines deals on United States to St. Louis flight tickets
United Airlines
Jan 14
ICT3:00 pmWichita Eisenhower National
7h 00m
1 stop
STL10:00 pmLambert-St Louis
Jan 19
STL2:45 pmLambert-St Louis
5h 44m
1 stop
ICT8:29 pmWichita Eisenhower National
$191
Find similar
United Airlines
Dec 11
ICT9:14 amWichita Eisenhower National
7h 14m
1 stop
STL4:28 pmLambert-St Louis
Dec 12
STL5:27 pmLambert-St Louis
4h 49m
1 stop
ICT10:16 pmWichita Eisenhower National
$193
Find similar
United Airlines
Dec 12
ICT9:14 amWichita Eisenhower National
7h 14m
1 stop
STL4:28 pmLambert-St Louis
Dec 14
STL6:30 amLambert-St Louis
4h 49m
1 stop
ICT11:19 amWichita Eisenhower National
$195
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from United States 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 November 6, 2025.
Use the filters below to find and compare flights from the United States to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverSt. Louis

DEN - STL

DENSTL

Denver Intl

Sat 12/13

7:05 am-10:14 am

Nonstop2h 09m

Lambert-St Louis

Mon 12/15

7:43 pm-9:15 pm

Nonstop2h 32m

$93

DenverSt. Louis

DEN - STL

DENSTL

Denver Intl

Fri 11/21

6:50 am-10:02 am

Nonstop2h 12m

Lambert-St Louis

Sat 11/22

7:43 pm-9:17 pm

Nonstop2h 34m

$97

WichitaSt. Louis

ICT - STL

ICTSTL

Wichita Eisenhower National

Wed 12/3

6:05 am-7:30 am

Nonstop1h 25m

Lambert-St Louis

Wed 12/10

8:40 pm-10:05 pm

Nonstop1h 25m

$117

WichitaSt. Louis

ICT - STL

ICTSTL

Wichita Eisenhower National

Wed 12/3

4:05 pm-5:25 pm

Nonstop1h 20m

Lambert-St Louis

Wed 12/10

1:45 pm-7:20 pm

1 stop5h 35m

$127

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Tue 12/2

5:48 pm-7:30 pm

Nonstop1h 42m

Lambert-St Louis

Tue 12/9

7:00 am-9:16 am

Nonstop2h 16m

$149

WichitaSt. Louis

ICT - STL

ICTSTL

Wichita Eisenhower National

Wed 12/3

5:19 pm-9:57 pm

1 stop4h 38m

Lambert-St Louis

Wed 12/17

12:49 pm-8:08 pm

1 stop7h 19m

$157

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Wed 12/17

8:49 am-10:36 am

Nonstop1h 47m

Lambert-St Louis

Wed 12/17

1:20 pm-3:22 pm

Nonstop2h 02m

$159

WichitaSt. Louis

ICT - STL

ICTSTL

Wichita Eisenhower National

Tue 12/9

7:38 am-12:04 pm

1 stop4h 26m

Lambert-St Louis

Thu 12/11

6:00 am-11:03 am

1 stop5h 03m

$169

WichitaSt. Louis

ICT - STL

ICTSTL

Wichita Eisenhower National

Wed 1/14

3:00 pm-10:00 pm

1 stop7h 00m

Lambert-St Louis

Mon 1/19

2:45 pm-8:29 pm

1 stop5h 44m

$191

WichitaSt. Louis

ICT - STL

ICTSTL

Wichita Eisenhower National

Thu 12/11

9:14 am-4:28 pm

1 stop7h 14m

Lambert-St Louis

Fri 12/12

5:27 pm-10:16 pm

1 stop4h 49m

$193

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 United States 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, January is the cheapest month to fly from United States to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $300. The month of March is another great option to travel to St. Louis, with average flight prices from United States averaging around $308.

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 $319. 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 $439. 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 United States in the morning is the least expensive time of day to depart. momondo users have found prices as low as $344 when looking at flights departing in the morning. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $377 per ticket.

What is the cheapest United States to Lambert-St Louis flight route?

Fly from Atlanta Hartsfield-Jackson to Lambert-St Louis for the best United States - Lambert-St Louis flight prices

What cabin class options are available on United States to Lambert-St Louis flights?

There are 4 cabin classes available to choose from on United States 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 United States to St. Louis flights?

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

Cheap United States to St. Louis flight deals and tips

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

Best Price Found

$89

Fastest flight time

1h 20m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from United States in the past 72 hours is $89. The best round-trip flight deal from United States to St. Louis found on momondo in the last 72 hours is $61.
The fastest flight from United States to St. Louis takes 1h 20m
Direct flights go from United States to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

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

    Prices for flights from United States to Lambert-St Louis Airport are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United States 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 United States to St. Louis?

Best airlines flying from United States to St. Louis

Compare and see reviews for airlines that fly from United States to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $55Free CancellationRating
5.8
3,116 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $80Free CancellationRating
6.3
8,114 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $133Free CancellationRating
7.2
11,041 reviews
Search American Airlines flights
United AirlinesPriceFrom $155Free CancellationRating
7.4
9,003 reviews
Search United Airlines flights
DeltaPriceFrom $168Free CancellationRating
7.9
8,004 reviews
Search Delta flights
SouthwestPriceFrom $177Free CancellationRating
8.0
4,240 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $257Free CancellationRating
8.0
11,243 reviews
Search Alaska Airlines flights

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
Florissant
Maryland Heights
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
Eureka
Litchfield
Shrewsbury

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from United States to St. Louis for you.

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

Yes. momondo enables you to select and highlight flights to St. Louis from United States with this policy.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from United States to St. Louis.

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

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from United States and alert you when they change.

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