Cheap flights from St. Louis to the United States from $39
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to the United States departing on 2/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from St. Louis to the United States
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Alaska Airlines flights from St. Louis to United States
Our best Alaska Airlines deals on St. Louis to United States flight tickets
Frontier flights from St. Louis to United States
Our best Frontier deals on St. Louis to United States flight tickets
See travel insights to the United States from
How to get the cheapest flight ticket from St. Louis to United States
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to United States?
In general, September is the cheapest month to fly from St. Louis to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $294. If you aren’t able to travel during the month of September, then book flights to United States from St. Louis during May instead. Flights to United States in May, while not as cheap as those in September, still average around $298.
What is the cheapest day to depart on your flight to United States?
According to our data, Thursday is the cheapest day to fly to United States from St. Louis. The lowest ticket price found for a Thursday departure recently was $360. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $447. These prices are subject to change though, so be sure to set up a Price Alert for flights to United States.
What is the cheapest time of day to depart on your flight to United States?
The cheapest time of day to fly to United States is at noon when flights can be purchased for as low as $325. Try not to purchase tickets in the afternoon because they tend to be around $433. Of course, these prices can vary depending on the time of year and what airport you fly to.
What is the cheapest Lambert-St Louis to United States flight route?
Fly from Lambert-St Louis to Denver Intl for the best Lambert-St Louis - United States flight prices
How far in advance should I book a flight to United States?
You are more likely to see cheaper flights to United States from St. Louis when booking 5 weeks ahead of your departure date. In general, you can expect to find flights to United States for around $360 when searching 5 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United States from St. Louis for as low as $286 on momondo.
What cabin class options are available on Lambert-St Louis to United States flights?
There are 4 cabin classes available to choose from on Lambert-St Louis to United States flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Lambert-St Louis to United States?
Frontier, Spirit Airlines, and Delta are the most popular carriers operating from Lambert-St Louis to United States
What airlines fly to United States?
Frontier, American Airlines and United Airlines are the top three most popular airlines that fly to United States from St. Louis according to our data. Frontier is the first choice among our users, with 38% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 10 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.
How many flights depart from St. Louis to United States on average per day?
55 flights are operational daily from St. Louis to United States as of February 2025. The most popular departure time for this route is 4:00PM, with 49% of flights per day taking off at noon.
How many flights depart from St. Louis to United States on average per week?
As of February 2025, 386 flights take off from St. Louis and land in United States each week. The most common flight departure day for this route is Mon, with 21% of weekly flights taking off on this day.
Cheap St. Louis to United States flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to United States
Best Price Found | $39 |
|---|---|
Fastest flight time | 2h 05m |
Direct flights | Every day |
Airports in United States | 10 airports |
When did momondo last update prices for flights from Lambert-St Louis Airport to United States?
Prices for flights from Lambert-St Louis Airport to United States refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to United States?
As of February 2025, there are 8 operators available to choose from for flights from Lambert-St Louis Airport to United States.
How old do you have to be to fly from Lambert-St Louis Airport to United States?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to United States.
What documentation or ID do you need to fly to United States?
The required travel and health documents for your United States trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at United States. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from St. Louis to United States?
momondo data reveals that the most frequently booked plane model on the route from St. Louis to United States is Boeing 737-700 Passenger/BBJ1 (winglets), representing 17.89% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 17.73%, Boeing 737 MAX 8 at 17.11%, and Embraer 175 at 7.02%.
Best airlines flying from St. Louis to United States
Compare and see reviews for airlines that fly from St. Louis to United States with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $45 | Free Cancellation | Rating 6.0 3,355 reviews | |||
| PriceFrom $69 | Free Cancellation | Rating 6.3 8,013 reviews | |||
| PriceFrom $131 | Free Cancellation | Rating 8.0 8,219 reviews | |||
| PriceFrom $150 | Free Cancellation | Rating 7.4 8,765 reviews | |||
| PriceFrom $177 | Free Cancellation | Rating 8.1 4,411 reviews | |||
| PriceFrom $189 | Free Cancellation | Rating 6.6 28 reviews | |||
| PriceFrom $192 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $236 | Free Cancellation | Rating 8.0 9,697 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to United States?
Finding the right flight to United States from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to United States quick and easy, saving you time and money.
Can I find flights from St. Louis to United States with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for St. Louis to United States flights to just show those with flexible booking policies.
How can momondo help me find flights from St. Louis to United States?
Once you have performed a search for St. Louis to United States flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from St. Louis to United States right now. Can momondo alert me if prices change?
Price alerts on flights to United States from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.