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Cheap flights from St Louis (STL) to USA

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How to find the cheapest flight from
St Louis (STL) to USA

How far in advance should I book a flight from St Louis to USA?

To save up to 18% on this flight, we recommend booking at least 24 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from St Louis to USA from $262 1-2 weeks out and tickets from $304 for flights departing within the next 72 hours.

What is the cheapest month to fly from St Louis to USA?

August can be a great time to fly to USA from St Louis with a flight ticket averaging about $260. Cheapflights users have found deals in the month of August for as cheap as $64. The most expensive prices can be found in the month of December.

Cheap flights from St Louis to USA in January, February 2021

The best prices found for STL to USA flights for January, February
22 Feb - 24 Feb
$54pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
28 Jan - 1 Feb
$55pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
28 Jan - 1 Feb
$56pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis

St Louis to USA 2021 flight deals

Cheap flights to USA from St Louis found for this year
22 Feb - 24 Feb
$54pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
11 Mar - 15 Mar
$55pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
25 Mar - 1 Apr
$56pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis

Non-stop flights to USA from St Louis

Save time with St Louis to USA direct flight deals
22 Feb - 24 Feb
$54pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
11 Mar - 15 Mar
$55pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
25 Mar - 1 Apr
$56pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis

Last minute flights from St Louis to USA

Late deals on round-trip flights to USA from St Louis, departing today and this week
18 Jan - 25 Jan
$55pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
22 Jan - 24 Jan
$64pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
22 Jan - 24 Jan
$66pp
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis

One-way flights to USA from St Louis

The cheapest one-way flights from St Louis to USA
1:00 am - 3:40 am
American Airlines
Nonstop
3h 40m
STL - PHX
American Airlines
12:02 pm - 1:40 pm
United Airlines
Nonstop
2h 38m
STL - DEN
United Airlines
$49
United
1:05 am - 4:49 am
Major Airline
Nonstop
2h 44m
STL - MIA
Major Airline
$58
StudentUniverse

Related info for your journey

Useful info, stats and facts about St Louis to USA flights.

Flight FAQs

From St Louis to USA

Are flight prices decreasing from St Louis to USA due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both St Louis and USA for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Lambert-St Louis to United States to control the spread of COVID-19?

New policies can now be found on Alaska Airlines and Delta to help keep travelers safe while flying. Some of the new policies that have been implemented to accommodate travelers flying from Lambert-St Louis to United States are improved sanitation, HEPA filters, mask requirements, social distance seating (for a limited time), and pre-flight testing for antibodies and symptoms. Policies will vary by airline.

Which airlines flying from Lambert-St Louis to United States have flexible cancellations due to COVID-19?

Frontier, American Airlines, and United Airlines are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from St Louis to USA for under $100 on Cheapflights?

Yes, there are multiple flights from St Louis to USA for under $100. The cheapest flight booked recently is on Frontier for just $54, but on average you can expect to pay $72.

Are there nonstop flights from St Louis to USA for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from St Louis to USA under $100. A good price for a nonstop flight from St Louis to USA is less than $73.

Are there last-minute flights available from St Louis to USA for under $100?

There are currently 20+ open flights from St Louis to USA within the next 7 days for less than $100.

How popular is this flight route?

The Lambert-St Louis to United States flight path was viewed by 1,161 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

What are the most popular airlines that fly from St Louis to USA?

Major Airline, American Airlines and Alaska Airlines are the most popular airlines when flying from St Louis to USA.

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

Most travelers choose Lambert-St Louis - Las Vegas McCarran, Lambert-St Louis - Miami or Lambert-St Louis - Phoenix Sky Harbor Intl when deciding on the best route from St Louis to USA.

What are the cheapest Flights from St Louis to USA?

The cheapest flight price from St Louis to USA is $111. On average you can expect to pay $779. The most popular route, (Lambert-St Louis - Las Vegas McCarran), can usually be booked for $119.

How long is the flight from St Louis to USA?

For as low as $97, United Airlines can have you in USA from St Louis in 2h 20m. All flights are typically nonstop.

What are the cheapest airlines flying from St Louis to USA round-trip?

Our cheapest airline available from St Louis to USA is Frontier. Our recent data shows that you can find tickets from as low as $54 on this airline. An additional option worth looking into is American Airlines, starting at $87.

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

One-way options have recently been found by users for as low as $27 on Frontier. Other airlines that offer cheap prices include American Airlines from $44 and United Airlines from $49 one-way.

Arrival points for flights from St Louis to USA

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Destination information for USA

Things to know before you go. Useful info for your trip from St Louis to USA
Flight duration
2h 25m

Airports servicing St. Louis

Top 8 airlines flying from St Louis to USA

The chart below displays the airlines Cheapflights users traveling from St Louis to USA choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.

Airline Cheapest Average Flexibility On-time COVID-19 safety
Sun Country Air
$58 $205 No cancel fee 83%
Frontier
$57 $208 No cancel fee 62%
Allegiant Air
$104 $220 No cancel fee 88%
United Airlines
$67 $268 No cancel fee 69%
Delta
$77 $289 No cancel fee N/A
American Airlines
$57 $302 No cancel fee 71%
Southwest
$69 $448 No cancel fee 63%
Alaska Airlines
$229 $677 No cancel fee 75%
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