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$55+ 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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
Apr 9 — Apr 161
Wed 4/9
Wed 4/16
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 April 4, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$96
(Cheapflightsfares)

One-way from

$55
(Cheapflightsfares)

Popular in

November

Cheapest in

May

Average price

$293

Good round-trip deal

$97 or less

Good one-way deal

$75 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 ($35 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 4, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/108:15 pmSTL - DEN
Nonstop2h 33mFrontier
Wed 5/146:50 amDEN - STL
Nonstop2h 09mFrontier
Deal found 4/3$96
This Frontier deal was found by Cheapflights users on 4/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/295:41 pmSTL - MCO
Nonstop2h 32mFrontier
Wed 5/710:24 pmMCO - STL
Nonstop2h 42mFrontier
Deal found 4/3$98
This FlightHub deal was found by Cheapflights users on 4/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/810:10 amSTL - MCO
1 stop9h 27mMultiple Airlines
Tue 5/1310:24 pmMCO - STL
Nonstop2h 42mMultiple Airlines
Deal found 4/3$116
This Cheapflightsfares deal was found by Cheapflights users on 4/4. 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.
Sun 5/119:55 pmSTL - LAS
Nonstop3h 46mFrontier
Mon 5/193:39 pmLAS - STL
Nonstop3h 26mFrontier
Deal found 4/4$129
This FlightHub deal was found by Cheapflights users on 4/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/276:10 pmSTL - LAS
1 stop8h 49mMultiple Airlines
Thu 5/13:39 pmLAS - STL
Nonstop3h 26mMultiple Airlines
Deal found 4/3$154
This Mytrip deal was found by Cheapflights users on 4/3. 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.
Sun 5/46:10 pmSTL - MCO
1 stop14h 16mSpirit Airlines
Tue 5/66:00 amMCO - STL
1 stop12h 15mSpirit Airlines
Deal found 4/3$189
This Delta deal was found by Cheapflights users on 4/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/182:15 pmSTL - SEA
1 stop6h 11mDelta
Wed 8/209:55 amSEA - STL
1 stop6h 08mDelta
Deal found 4/4$189
This Cheapflightsfares deal was found by Cheapflights users on 4/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/16:10 pmSTL - LAS
1 stop8h 49mSpirit Airlines
Wed 5/79:24 pmLAS - STL
1 stop9h 51mSpirit Airlines
Deal found 4/3$190
This Southwest deal was found by Cheapflights users on 4/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/263:25 pmSTL - SEA
1 stop10h 50mSouthwest
Sun 8/310:40 pmSEA - STL
1 stop9h 35mSouthwest
Deal found 4/4$194
This Mytrip deal was found by Cheapflights users on 4/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/154:17 pmSTL - LGA
1 stop18h 48mSpirit Airlines
Thu 6/196:30 amLGA - STL
1 stop9h 52mSpirit Airlines
Deal found 4/4$195
This Southwest deal was found by Cheapflights users on 4/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/205:55 pmSTL - DEN
Nonstop2h 25mSouthwest
Tue 5/278:35 amDEN - STL
Nonstop2h 00mSouthwest
Deal found 4/3$196
This Delta deal was found by Cheapflights users on 4/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/105:00 pmSTL - DEN
1 stop5h 48mDelta
Wed 5/145:30 amDEN - STL
1 stop7h 04mDelta
Deal found 4/4$197

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 April 4, 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

Sat 5/10

8:15 pm-9:48 pm

Nonstop2h 33m

Denver Intl

Wed 5/14

6:50 am-9:59 am

Nonstop2h 09m

$96

St. LouisOrlando

STL - MCO

STLMCO

Lambert-St Louis

Tue 4/29

5:41 pm-9:13 pm

Nonstop2h 32m

Orlando

Tue 5/6

10:24 pm-12:06 am

Nonstop2h 42m

$98

St. LouisOrlando

STL - MCO

STLMCO

Lambert-St Louis

Thu 5/8

10:10 am-8:37 pm

1 stop9h 27m

Orlando

Tue 5/13

10:24 pm-12:06 am

Nonstop2h 42m

$116

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sun 5/11

9:55 pm-11:41 pm

Nonstop3h 46m

Las Vegas Harry Reid Intl

Mon 5/19

3:39 pm-9:05 pm

Nonstop3h 26m

$129

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sun 4/27

6:10 pm-12:59 am

1 stop8h 49m

Las Vegas Harry Reid Intl

Thu 5/1

3:39 pm-9:05 pm

Nonstop3h 26m

$154

St. LouisDenver

STL - DEN

STLDEN

Lambert-St Louis

Tue 5/13

5:55 am-7:15 am

Nonstop2h 20m

Denver Intl

Tue 5/20

7:15 am-10:20 am

Nonstop2h 05m

$177

St. LouisOrlando

STL - MCO

STLMCO

Lambert-St Louis

Sun 5/4

6:10 pm-9:26 am

1 stop14h 16m

Orlando

Tue 5/6

6:00 am-5:15 pm

1 stop12h 15m

$189

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Mon 8/18

2:15 pm-6:26 pm

1 stop6h 11m

Seattle/Tacoma Intl

Wed 8/20

9:55 am-6:03 pm

1 stop6h 08m

$189

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Thu 5/1

6:10 pm-12:59 am

1 stop8h 49m

Las Vegas Harry Reid Intl

Wed 5/7

9:24 pm-9:15 am

1 stop9h 51m

$190

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Sat 7/26

3:25 pm-12:15 am

1 stop10h 50m

Seattle/Tacoma Intl

Sun 8/3

10:40 pm-10:15 am

1 stop9h 35m

$194

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

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 June is currently the most expensive (average of $328). 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 April 4, 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 April 4, 2025.

The most flights from STL to US0 are scheduled on a Friday (11 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (5 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 April 4, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest 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.
Alaska Airlines
8.0
Very good
9,837 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,837 reviews
Alaska Airlines
8.0
Very good
9,837 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,276 reviews
Alaska Airlines
8.0
Very good
9,837 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,899 reviews
Alaska Airlines
8.0
Very good
9,837 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,353 reviews
Alaska Airlines
8.0
Very good
9,837 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,618 reviews
Alaska Airlines
8.0
Very good
9,837 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.

  • 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 $55. Spirit Airlines flights start at $63 while deals on United Airlines start at $89 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 - Dallas/Fort Worth.

  • 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 (85%), Air Tahiti Nui( 85%).

  • 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 $1,187, our data indicates the cheapest price to be $138. The most popular route (Lambert-St Louis - Seattle/Tacoma Intl), is priced around $189.

  • 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 June is currently the most expensive (average of $328). 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 8 airlines flying from St. Louis to USA

Discover the top 8 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 April 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$45Average$181FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$74Average$203FlexibilityNo cancel feeOn-time65%
DeltaCheapest$128Average$355FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$153Average$408FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$178Average$401FlexibilityNo cancel feeOn-time63%
Southern / MokuleleCheapest$186Average$225FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$192Average$382FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$296Average$547FlexibilityNo cancel feeOn-time75%

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