$28+ 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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from St. Louis to USA with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.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 January 6, 2026.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $66 (Kiwi.com) |
One-way from | $28 (Kiwi.com) |
Popular in | November |
Cheapest in | April |
Average price | $315 |
Good round-trip deal | $131 or less |
Good one-way deal | $88 or less |
Find flight deals from St. Louis to USA
Cheapest flights from St. Louis to USAExplore 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 January 6, 2026.
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 January 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 1/4. 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.
This Kiwi.com deal was found by Cheapflights users on 1/5. 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.
This Kiwi.com deal was found by Cheapflights users on 1/4. 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.
This Frontier deal was found by Cheapflights users on 1/4. 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.
This Kiwi.com deal was found by Cheapflights users on 1/5. 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.
This Frontier deal was found by Cheapflights users on 1/6. 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.
This Super.com deal was found by Cheapflights users on 1/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Frontier deal was found by Cheapflights users on 1/5. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Super.com deal was found by Cheapflights users on 1/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 1/4. 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.
This Super.com deal was found by Cheapflights users on 1/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Cheapflightsfares deal was found by Cheapflights users on 1/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Use the filters below to find and compare flights from St. Louis to the United States that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Fri 2/13
1:59 pm-3:35 pm
Nonstop2h 36m
Denver Intl
Wed 2/18
12:48 pm-3:53 pm
Nonstop2h 05m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Wed 2/25
4:51 pm-6:25 pm
Nonstop2h 34m
Denver Intl
Sat 2/28
7:24 am-5:46 pm
1 stop9h 22m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Mon 2/2
1:40 pm-3:16 pm
Nonstop2h 36m
Denver Intl
Thu 2/5
7:10 am-9:06 pm
1 stop12h 56m
St. LouisOrlando
STL - MCO
STLMCO
Lambert-St Louis
Sat 2/21
12:30 pm-8:00 pm
2 stops6h 30m
Orlando
Tue 2/24
7:50 am-9:35 am
Nonstop2h 45m
St. LouisOrlando
STL - MCO
STLMCO
Lambert-St Louis
Mon 2/9
12:20 pm-8:15 pm
1 stop6h 55m
Orlando
Wed 2/11
6:05 am-11:45 am
1 stop6h 40m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Wed 2/25
5:55 pm-9:40 pm
1 stop4h 45m
Denver Intl
Sat 2/28
8:30 pm-11:35 pm
Nonstop2h 05m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Tue 2/3
4:15 pm-5:53 pm
Nonstop2h 38m
Denver Intl
Tue 2/10
5:50 pm-8:58 pm
Nonstop2h 08m
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Wed 3/11
7:00 am-9:42 am
Nonstop4h 42m
Seattle/Tacoma Intl
Sun 3/15
6:07 pm-11:59 pm
Nonstop3h 52m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Sun 2/22
4:35 pm-6:00 pm
Nonstop2h 25m
Denver Intl
Wed 2/25
7:00 am-10:15 am
Nonstop2h 15m
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Fri 3/20
5:25 pm-11:40 pm
1 stop8h 15m
Seattle/Tacoma Intl
Mon 3/23
11:15 pm-9:46 am
1 stop8h 31m
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.
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 $37). 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 January 6, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 11% 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 January 3, 2026.
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.
How often are flights from St. Louis to the United States delayed?
About 14% of weekly flights between St. Louis and United States have experienced delays in the past year, with the average delay time being 130 minutes.
What is the most punctual flight time for St. Louis to the United States flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on St. Louis to the United States flights?
Over the last year, Southwest have had the lowest number of delays on this route, with just 13% of flights being delayed.
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 January 6, 2026.
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.
Crew
Comfort
Food
Entertainment
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Comfort
Food
Entertainment
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Comfort
Food
Entertainment
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Comfort
Food
Entertainment
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Comfort
Food
Entertainment
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Comfort
Food
Entertainment
Boarding
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
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.
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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.
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 January 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$50 | Average$205 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$73 | Average$182 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$128 | Average$347 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$150 | Average$398 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$176 | Average$407 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$182 | Average$362 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$296 | Average$500 | FlexibilityNo cancel fee | On-time75% |