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$37+ Cheap flights from St. Louis (STL) to the United States

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.
STL — LAX
Dec 5 — Dec 121
Fri 12/5
Fri 12/12
1 adult, Economy
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Cheap flight deals from St. Louis to USA

Keep the following information in mind while searching for St. Louis to USA flight deals. Data was last updated November 5, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$77
(Kiwi.com)

One-way from

$37
(Kiwi.com)

Popular in

November

Cheapest in

April

Average price

$381

Good round-trip deal

$158 or less

Good one-way deal

$64 or less
Provider with most accurate pricing for Lambert-St Louis-New York (NYC) flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-New York (NYC) flights.
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From Lambert-St Louis to USA
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One-way flight from Lambert-St Louis to USA
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Highest demand for flights based on searches. 15% potential increase in price ($56 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Lambert-St Louis to USA.
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Price to beat on a one-way flight from Lambert-St Louis to USA.
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Find flight deals from St. Louis to USA

Cheapest flights from St. Louis to USA
Explore the most affordable flight options available from St. Louis to USA. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 5, 2025.

This Expedia deal was found by Cheapflights users on 11/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/37:43 pmSTL - DEN
Nonstop2h 32mFrontier
Wed 12/107:05 amDEN - STL
Nonstop2h 09mFrontier
Deal found 11/3$68
This Kiwi.com deal was found by Cheapflights users on 11/4. 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 11/197:45 pmSTL - DEN
Nonstop2h 28mFrontier
Sat 11/296:50 amDEN - STL
Nonstop2h 12mFrontier
Deal found 11/4$77
This Frontier deal was found by Cheapflights users on 11/4. 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.
Wed 11/197:45 pmSTL - DEN
Nonstop2h 28mFrontier
Mon 11/246:50 amDEN - STL
Nonstop2h 12mFrontier
Deal found 11/4$78
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/67:43 pmSTL - DEN
Nonstop2h 32mFrontier
Sat 12/1310:37 pmDEN - STL
1 stop12h 35mFrontier
Deal found 11/4$84
This Mytrip deal was found by Cheapflights users on 11/3. 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.
Sat 12/67:43 pmSTL - DEN
Nonstop2h 32mFrontier
Mon 12/811:59 pmDEN - STL
1 stop21h 34mFrontier
Deal found 11/3$85
This Priceline deal was found by Cheapflights users on 11/4. 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.
Sat 11/157:45 pmSTL - DEN
Nonstop2h 28mFrontier
Wed 11/192:45 pmDEN - STL
1 stop7h 16mFrontier
Deal found 11/4$89
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/137:43 pmSTL - DEN
Nonstop2h 32mFrontier
Mon 12/157:05 amDEN - STL
Nonstop2h 09mFrontier
Deal found 11/4$93
This Kiwi.com deal was found by Cheapflights users on 11/5. 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 11/277:57 pmSTL - DEN
Nonstop2h 34mFrontier
Fri 11/286:50 amDEN - STL
Nonstop2h 12mFrontier
Deal found 11/5$97
This Frontier deal was found by Cheapflights users on 11/4. 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.
Mon 11/247:43 pmSTL - DEN
Nonstop2h 34mFrontier
Sat 11/296:50 amDEN - STL
Nonstop2h 12mFrontier
Deal found 11/4$98
This Flightnetwork deal was found by Cheapflights users on 11/4. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/157:45 pmSTL - DEN
Nonstop2h 28mFrontier
Tue 11/186:00 amDEN - STL
Nonstop2h 07mFrontier
Deal found 11/4$99
This Kiwi.com deal was found by Cheapflights users on 11/4. 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.
Tue 11/187:45 pmSTL - DEN
Nonstop2h 28mFrontier
Mon 11/246:50 amDEN - STL
Nonstop2h 12mFrontier
Deal found 11/4$102
This Frontier deal was found by Cheapflights users on 11/4. 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.
Tue 11/187:45 pmSTL - DEN
Nonstop2h 28mFrontier
Sat 11/296:50 amDEN - STL
Nonstop2h 12mFrontier
Deal found 11/4$103

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to USA 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 November 5, 2025.
Use the filters below to find and compare flights from St. Louis to the United States that are best for you.

Fly from

St. Louis

Fly to

USA

Route

Depart

Return

Price

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Wed 12/10

3:30 pm-11:04 pm

1 stop8h 34m

Denver Intl

Sat 12/13

7:05 am-10:14 am

Nonstop2h 09m

$84

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Thu 12/4

12:04 pm-10:54 pm

1 stop10h 50m

Dallas/Fort Worth

Sun 12/7

9:10 am-9:52 am

1 stop24h 42m

$156

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Mon 2/2

5:00 pm-11:32 pm

1 stop8h 32m

Las Vegas Harry Reid Intl

Mon 2/9

6:15 am-2:38 pm

1 stop6h 23m

$157

St. LouisOrlando

STL - MCO

STLMCO

Lambert-St Louis

Tue 11/18

7:45 pm-2:44 pm

3 stops17h 59m

Orlando

Sun 11/23

10:17 pm-11:57 pm

Nonstop2h 40m

$176

St. LouisOrlando

STL - MCO

STLMCO

Lambert-St Louis

Sat 1/17

7:43 pm-5:33 am

1 stop8h 50m

Orlando

Tue 1/20

8:43 pm-10:33 pm

Nonstop2h 50m

$184

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Thu 12/11

1:35 pm-3:05 pm

Nonstop2h 30m

Denver Intl

Sat 12/13

9:35 am-12:39 pm

Nonstop2h 04m

$197

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Sat 12/6

5:45 pm-7:05 pm

Nonstop2h 20m

Denver Intl

Mon 12/8

8:15 am-11:20 am

Nonstop2h 05m

$197

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Wed 12/3

5:28 pm-10:53 pm

1 stop6h 25m

Denver Intl

Fri 12/5

12:50 am-10:24 am

1 stop8h 34m

$197

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Fri 12/5

5:14 am-7:23 am

Nonstop2h 09m

Dallas/Fort Worth

Mon 12/8

10:45 am-12:32 pm

Nonstop1h 47m

$199

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Sat 12/13

5:12 pm-12:03 am

1 stop6h 51m

Dallas/Fort Worth

Sun 12/14

6:50 am-12:04 pm

1 stop5h 14m

$200

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 60 results
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Best time to book a flight from St. Louis to USA

Have a flexible travel schedule? Discover the best time to fly to USA from St. Louis 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 St. Louis to the United States

What is the cheapest month to book a flight from St. Louis to USA?

Currently, February is the cheapest month in which you can book a flight from St. Louis to USA (average of $36). Flying from St. Louis to USA in July is currently the most expensive (average of $89). 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 STL to US?

Find hourly flight availability from St. Louis to USA. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 5, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 19% on flights from St. Louis to USA by exploring options for tickets in the evening.

What is the cheapest day to fly from St. Louis to USA?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to USA. Price data was last updated on November 2, 2025.

Travelers seeking maximum savings on their St. Louis to USA flight should consider departing on Saturday evenings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from St. Louis to USA

Explore weekly flight availability from St. Louis to USA. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 5, 2025.

The most flights from STL to US0 are scheduled on a Monday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

Reviews of airlines servicing USA

Get insights into the airlines that provide service to USA. 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 USA. Reviews last updated November 5, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from St. Louis to the United States to help guide your decision. 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
4,240 reviews

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

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
4,240 reviews
Southwest
8.0
Very good
4,240 reviews

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

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
8,004 reviews
Southwest
8.0
Very good
4,240 reviews

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

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
9,002 reviews
Southwest
8.0
Very good
4,240 reviews

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

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
11,042 reviews
Southwest
8.0
Very good
4,240 reviews

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

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
3,116 reviews
Southwest
8.0
Very good
4,240 reviews

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

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 St. Louis to USA. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to United States?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to United States. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

  • How popular is this St. Louis to USA flight route?

    Flights from Lambert-St Louis to United States have been viewed 16 times in the past calendar month.

  • How long is the flight from St. Louis to USA?

    For as low as $197, Frontier can have you in USA from St. Louis in 2h 30m. The distance between St. Louis and USA is about 767 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from St. Louis to USA one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $43. Southwest flights start at $70 while deals on Delta start at $79 one-way.

  • What are the most popular routes from St. Louis to USA?

    The most popular flight routes from St. Louis to USA are Lambert-St Louis - Las Vegas Harry Reid Intl, Lambert-St Louis - New York John F Kennedy Intl and Lambert-St Louis - New York LaGuardia.

  • What are the most reliable airlines from St. Louis to USA?

    Before booking your flight to USA from St. Louis, check out the most reliable airlines to get you to your destination on time: Southwest (73%), Cathay Pacific (68%), Qantas Airways( 68%).

  • What are the cheapest flights from St. Louis to USA?

    Looking for the cheapest flight from St. Louis to USA? While on average our users pay $885, our data indicates the cheapest price to be $147. The most popular route (Lambert-St Louis - Las Vegas Harry Reid Intl), is priced around $120.

  • Can I find deals for flights from St. Louis to USA that include hotel bookings?

    Yes. In addition to deals on St. Louis to USA flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to USA?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to USA.

  • Can I find deals for business class flights from St. Louis to USA?

    Yes. Cheapflights offers flight deals from St. Louis to USA 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 St. Louis to USA?

    Currently, February is the cheapest month in which you can book a flight from St. Louis to USA (average of $36). Flying from St. Louis to USA in July is currently the most expensive (average of $89). 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

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Alternative routes for St. Louis to USA

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from St. Louis to USA

Discover the top 7 airlines that operate flights from St. Louis to USA. 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 November 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$50Average$201FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$73Average$189FlexibilityNo cancel feeOn-time65%
DeltaCheapest$108Average$347FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$150Average$402FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$160Average$370FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$177Average$407FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$257Average$467FlexibilityNo cancel feeOn-time75%

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