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$45+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
mar. 23 — mar. 301
dom. 3/23
dom. 3/30
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 marzo 18, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$77
(Kiwi.com)

One-way from

$45
(Kiwi.com)

Popular in

November

Cheapest in

September

Average price

$299

Good round-trip deal

$133 or less

Good one-way deal

$72 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. 10% potential increase in price ($36 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in March 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 marzo 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 3/17. 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.
sáb. 8/97:24 pmSTL - DEN
Nonstop2h 29mFrontier
mié. 8/136:00 amDEN - STL
Nonstop2h 11mFrontier
Deal found 3/17$77
This Frontier deal was found by Cheapflights users on 3/17. 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.
jue. 5/155:47 pmSTL - MCO
Nonstop2h 32mFrontier
lun. 5/1910:24 pmMCO - STL
Nonstop2h 42mFrontier
Deal found 3/17$98
This Booking.com deal was found by Cheapflights users on 3/17. 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.
sáb. 5/1010:10 amSTL - MCO
1 stop9h 27mMultiple Airlines
mié. 5/1410:24 pmMCO - STL
Nonstop2h 42mMultiple Airlines
Deal found 3/17$99
This Mytrip deal was found by Cheapflights users on 3/18. 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.
mar. 4/86:47 pmSTL - MCO
1 stop13h 39mSpirit Airlines
jue. 4/106:00 amMCO - STL
1 stop12h 15mSpirit Airlines
Deal found 3/18$131
This Kiwi.com deal was found by Cheapflights users on 3/17. 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.
mar. 5/272:25 pmSTL - LAS
Nonstop3h 44mFrontier
sáb. 5/318:20 amLAS - STL
Nonstop3h 20mFrontier
Deal found 3/17$157
This Mytrip deal was found by Cheapflights users on 3/17. 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.
mar. 4/226:10 pmSTL - EWR
2 stops21h 50mSpirit Airlines
mar. 4/295:45 amEWR - STL
1 stop12h 30mSpirit Airlines
Deal found 3/17$172
This American Airlines deal was found by Cheapflights users on 3/18. 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.
lun. 4/75:27 pmSTL - DFW
Nonstop1h 58mAmerican Airlines
mié. 4/98:31 amDFW - STL
Nonstop1h 55mAmerican Airlines
Deal found 3/18$177
This United Airlines deal was found by Cheapflights users on 3/17. 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.
mar. 4/84:44 pmSTL - EWR
Nonstop2h 27mUnited Airlines
mié. 4/99:00 pmEWR - STL
Nonstop3h 15mUnited Airlines
Deal found 3/17$177
This CheapOair deal was found by Cheapflights users on 3/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/174:57 pmSTL - DFW
1 stop28h 47mFrontier
dom. 4/207:04 amDFW - STL
1 stop16h 42mFrontier
Deal found 3/17$180
This Booking.com deal was found by Cheapflights users on 3/17. 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.
lun. 4/76:38 pmSTL - JFK
1 stop9h 52mFrontier
mié. 4/96:59 amJFK - STL
1 stop30h 17mFrontier
Deal found 3/17$182
This Booking.com deal was found by Cheapflights users on 3/18. 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.
lun. 4/288:15 amSTL - DEN
1 stop9h 20mMultiple Airlines
sáb. 6/146:00 amDEN - STL
Nonstop2h 12mMultiple Airlines
Deal found 3/18$185
This Delta deal was found by Cheapflights users on 3/18. 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.
mar. 4/157:10 amSTL - DFW
1 stop7h 26mDelta
mar. 4/225:39 pmDFW - STL
1 stop5h 57mDelta
Deal found 3/18$197

Find flights from St. Louis to USA within your budget

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 marzo 18, 2025.

Fly from

St. Louis

Fly to

USA

Route

Depart

Return

Price

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

sáb. 8/9

7:24 pm-8:53 pm

Nonstop2h 29m

Denver Intl

mié. 8/13

6:00 am-9:11 am

Nonstop2h 11m

$77

St. LouisOrlando

STL - MCO

STLMCO

Lambert-St Louis

jue. 5/15

5:47 pm-9:19 pm

Nonstop2h 32m

Orlando

lun. 5/19

10:24 pm-12:06 am

Nonstop2h 42m

$98

St. LouisOrlando

STL - MCO

STLMCO

Lambert-St Louis

sáb. 5/10

10:10 am-8:37 pm

1 stop9h 27m

Orlando

mié. 5/14

10:24 pm-12:06 am

Nonstop2h 42m

$99

St. LouisOrlando

STL - MCO

STLMCO

Lambert-St Louis

mar. 4/8

6:47 pm-9:26 am

1 stop13h 39m

Orlando

jue. 4/10

6:00 am-5:15 pm

1 stop12h 15m

$131

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

mar. 5/27

2:25 pm-4:09 pm

Nonstop3h 44m

Las Vegas Harry Reid Intl

sáb. 5/31

8:20 am-1:40 pm

Nonstop3h 20m

$157

St. LouisNewark

STL - EWR

STLEWR

Lambert-St Louis

mar. 4/22

6:10 pm-5:00 pm

2 stops21h 50m

Newark

mar. 4/29

5:45 am-5:15 pm

1 stop12h 30m

$172

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

lun. 4/7

5:27 pm-7:25 pm

Nonstop1h 58m

Dallas/Fort Worth

mié. 4/9

8:31 am-10:26 am

Nonstop1h 55m

$177

St. LouisNewark

STL - EWR

STLEWR

Lambert-St Louis

mar. 4/8

4:44 pm-8:11 pm

Nonstop2h 27m

Newark

mié. 4/9

9:00 pm-11:15 pm

Nonstop3h 15m

$177

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

jue. 4/17

4:57 pm-9:44 pm

1 stop28h 47m

Dallas/Fort Worth

dom. 4/20

7:04 am-11:46 pm

1 stop16h 42m

$180

St. LouisNew York

STL - JFK

STLJFK

Lambert-St Louis

lun. 4/7

6:38 pm-5:30 am

1 stop9h 52m

New York John F Kennedy Intl

mié. 4/9

6:59 am-12:16 pm

1 stop30h 17m

$182

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/17

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.

Travel insights for flights from St. Louis to USA

Get recent, data-driven insights about flights from St. Louis to USA including ideal travel times, pricing trends, and more.

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 $336). 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 marzo 18, 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.

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 marzo 18, 2025.

The most flights from STL to US0 are scheduled on a Monday (11 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (8 on average).

Rainfall in USA by month

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

In terms of precipitation, rainfall in USA ranges from 2.8 - 4.5 inches per month. July is typically the wettest month, when rainfall can reach 4.5 in. February is typically the driest time to visit USA when rainfall is around 2.8 in.

Temperature in USA by month

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

If weather is an important factor for your trip to USA, 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 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

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 marzo 18, 2025.
Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta from St. Louis to USA. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,281 reviews

Boarding

8.2

Crew

8.7

Food

7.1

Overall

8.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,281 reviews
Southwest
8.1
Very good
4,281 reviews

Boarding

8.2

Crew

8.7

Food

7.1

Overall

8.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,753 reviews
Southwest
8.1
Very good
4,281 reviews

Boarding

8.2

Crew

8.7

Food

7.1

Overall

8.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,908 reviews
Southwest
8.1
Very good
4,281 reviews

Boarding

8.2

Crew

8.7

Food

7.1

Overall

8.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Hawaiian Airlines
7.9
Good
2,324 reviews
Southwest
8.1
Very good
4,281 reviews

Boarding

8.2

Crew

8.7

Food

7.1

Overall

8.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,611 reviews
Southwest
8.1
Very good
4,281 reviews

Boarding

8.2

Crew

8.7

Food

7.1

Overall

8.1

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 14 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 Frontier, which is currently one of the cheapest options available, starting at $45. Spirit Airlines flights start at $65 while deals on Southwest start at $84 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 - Miami.

  • 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: Sun Country Air (100%), Japan Airlines (87%), Qantas Airways( 87%).

  • 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 $421, our data indicates the cheapest price to be $151. The most popular route (Lambert-St Louis - Seattle/Tacoma Intl), is priced around $171.

  • 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 $336). 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 9 airlines flying from St. Louis to USA

Discover the top 9 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 marzo 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$45Average$183FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$70Average$204FlexibilityNo cancel feeOn-time65%
DeltaCheapest$128Average$349FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$151Average$407FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$178Average$415FlexibilityNo cancel feeOn-time63%
Southern / MokuleleCheapest$189Average$223FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$192Average$394FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$236Average$482FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$237Average$445FlexibilityNo cancel feeOn-time85%
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