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$49+ 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
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 July 2, 2025.

Round-trip from

$91
(American Airlines)

One-way from

$49
(American Airlines)

Popular in

November

Cheapest in

April

Average price

$305

Good round-trip deal

$149 or less

Good one-way deal

$82 or less
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. 12% potential increase in price ($41 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 July 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 July 2, 2025.

This American Airlines deal was found by Cheapflights users on 6/29. 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.
Sat 8/97:23 amSTL - ORD
Nonstop1h 25mAmerican Airlines
Tue 8/128:45 pmORD - STL
Nonstop1h 32mAmerican Airlines
Deal found 6/29$91
This Southwest deal was found by Cheapflights users on 7/1. 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.
Tue 8/122:25 pmSTL - ORD
1 stop7h 05mSouthwest
Wed 8/277:00 amORD - STL
1 stop6h 30mSouthwest
Deal found 7/1$111
This Priceline deal was found by Cheapflights users on 7/2. 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.
Mon 9/12:01 pmSTL - ORD
1 stop9h 53mFrontier
Sun 9/75:10 amORD - STL
1 stop9h 54mFrontier
Deal found 7/2$112
This Frontier deal was found by Cheapflights users on 7/1. 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 7/117:29 pmSTL - DEN
Nonstop2h 29mFrontier
Mon 7/146:00 amDEN - STL
Nonstop2h 11mFrontier
Deal found 7/1$122
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Thu 7/318:00 amSTL - ORD
Nonstop1h 25mUnited Airlines
Thu 8/79:20 pmORD - STL
Nonstop1h 25mUnited Airlines
Deal found 7/1$124
This Priceline deal was found by Cheapflights users on 7/2. 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.
Thu 9/184:00 pmSTL - EWR
1 stop7h 34mFrontier
Mon 9/225:55 amEWR - STL
1 stop10h 09mFrontier
Deal found 7/2$125
This Priceline deal was found by Cheapflights users on 7/1. 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.
Thu 9/44:00 pmSTL - EWR
1 stop7h 34mMultiple Airlines
Sun 9/710:00 amEWR - STL
1 stop4h 35mMultiple Airlines
Deal found 7/1$128
This Booking.com deal was found by Cheapflights users on 6/30. 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.
Thu 8/142:30 pmSTL - EWR
1 stop5h 30mSpirit Airlines
Thu 8/2110:00 amEWR - STL
1 stop4h 32mSpirit Airlines
Deal found 6/30$135
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 7/165:40 pmSTL - MCO
Nonstop2h 43mFrontier
Sat 7/199:26 amMCO - STL
1 stop5h 33mFrontier
Deal found 7/2$140
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 7/172:36 pmSTL - MCO
1 stop4h 37mMultiple Airlines
Wed 7/239:00 amMCO - STL
Nonstop2h 29mMultiple Airlines
Deal found 7/2$141
This Kiwi.com deal was found by Cheapflights users on 6/30. 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 7/2311:24 amSTL - MCO
Nonstop2h 27mSpirit Airlines
Sat 7/268:10 amMCO - STL
Nonstop2h 30mSpirit Airlines
Deal found 6/30$148
This Southwest deal was found by Cheapflights users on 7/2. 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.
Sat 8/165:45 amSTL - DEN
Nonstop2h 15mSouthwest
Mon 8/187:45 amDEN - STL
Nonstop2h 05mSouthwest
Deal found 7/2$157

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 July 2, 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. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Wed 7/30

6:00 am-7:24 am

Nonstop1h 24m

Chicago O'Hare Intl

Wed 8/6

5:05 pm-6:23 pm

Nonstop1h 18m

$91

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Tue 8/12

2:25 pm-9:30 pm

1 stop7h 05m

Chicago O'Hare Intl

Tue 8/26

7:30 am-2:30 pm

1 stop7h 00m

$111

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Mon 9/1

2:01 pm-11:54 pm

1 stop9h 53m

Chicago O'Hare Intl

Sun 9/7

5:10 am-3:04 pm

1 stop9h 54m

$112

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Fri 8/1

7:29 pm-8:58 pm

Nonstop2h 29m

Denver Intl

Fri 8/8

6:00 am-9:11 am

Nonstop2h 11m

$123

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Thu 7/31

8:00 am-9:25 am

Nonstop1h 25m

Chicago O'Hare Intl

Thu 8/7

9:20 pm-10:45 pm

Nonstop1h 25m

$124

St. LouisNewark

STL - EWR

STLEWR

Lambert-St Louis

Thu 9/18

4:00 pm-12:34 am

1 stop7h 34m

Newark

Mon 9/22

5:55 am-3:04 pm

1 stop10h 09m

$125

St. LouisNewark

STL - EWR

STLEWR

Lambert-St Louis

Thu 9/4

4:00 pm-12:34 am

1 stop7h 34m

Newark

Sun 9/7

10:00 am-1:35 pm

1 stop4h 35m

$128

St. LouisNewark

STL - EWR

STLEWR

Lambert-St Louis

Thu 8/14

2:30 pm-9:00 pm

1 stop5h 30m

Newark

Thu 8/21

10:00 am-1:32 pm

1 stop4h 32m

$135

St. LouisOrlando

STL - MCO

STLMCO

Lambert-St Louis

Wed 7/16

5:40 pm-9:23 pm

Nonstop2h 43m

Orlando

Sat 7/19

9:26 am-1:59 pm

1 stop5h 33m

$140

St. LouisOrlando

STL - MCO

STLMCO

Lambert-St Louis

Thu 7/17

2:36 pm-8:13 pm

1 stop4h 37m

Orlando

Wed 7/23

9:00 am-10:29 am

Nonstop2h 29m

$141

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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, January is the cheapest month in which you can book a flight from St. Louis to USA (average of $246). Flying from St. Louis to USA in March is currently the most expensive (average of $326). 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 July 2, 2025.

When flying from St. Louis to USA, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 July 2, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,272 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,983 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,540 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,861 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 12 times in the past calendar month.

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

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $49. Frontier flights start at $53 while deals on Spirit Airlines start at $55 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 - Seattle/Tacoma Intl, Lambert-St Louis - Las Vegas Harry Reid 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: Alaska Airlines (85%), American Airlines (82%), Japan Airlines( 79%).

  • 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 $708, our data indicates the cheapest price to be $162. The most popular route (Lambert-St Louis - Seattle/Tacoma Intl), is priced around $180.

  • 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, January is the cheapest month in which you can book a flight from St. Louis to USA (average of $246). Flying from St. Louis to USA in March is currently the most expensive (average of $326). 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 10 airlines flying from St. Louis to USA

Discover the top 10 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 July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$45Average$187FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$56Average$234FlexibilityNo cancel feeOn-time65%
DeltaCheapest$94Average$338FlexibilityNo cancel feeOn-timeN/A
Allegiant AirCheapest$104Average$238FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$153Average$403FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$179Average$404FlexibilityNo cancel feeOn-time63%
Southern / MokuleleCheapest$193Average$237FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$196Average$379FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$236Average$463FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$238Average$399FlexibilityNo cancel feeOn-time85%

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