$135 Cheap Flights from St. Louis (STL) to St. Thomas (STT)

View $135 flight on Sat, Oct 18, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Cyril E. King Airport (STT)

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Cheap Flights from St. Louis to St. Thomas (STL-STT)

Prices were available within the past 7 days and start at $135 for one-way flights and $256 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Spirit Airlines
Sat, Oct 18 - Sat, Oct 25
STL
St. Louis
STT
St. Thomas
$256 Roundtrip, found 5 hours ago
$256
Roundtrip
found 5 hours ago
Select Spirit Airlines flight, departing Sat, Oct 18 from St. Louis to St. Thomas, returning Sat, Oct 25, priced at $256 found 5 hours ago
American Airlines
Sat, Oct 18 - Sat, Oct 25
STL
St. Louis
STT
St. Thomas
$419 Roundtrip, found 5 hours ago
$419
Roundtrip
found 5 hours ago
Select American Airlines flight, departing Sat, Oct 18 from St. Louis to St. Thomas, returning Sat, Oct 25, priced at $419 found 5 hours ago
United
Sun, Oct 26 - Sat, Nov 1
STL
St. Louis
STT
St. Thomas
$420 Roundtrip, found 15 hours ago
$420
Roundtrip
found 15 hours ago
Select United flight, departing Sun, Oct 26 from St. Louis to St. Thomas, returning Sat, Nov 1, priced at $420 found 15 hours ago
American Airlines
Sat, Oct 18 - Sat, Oct 25
STL
St. Louis
STT
St. Thomas
$425 Roundtrip, found 5 hours ago
$425
Roundtrip
found 5 hours ago
Select American Airlines flight, departing Sat, Oct 18 from St. Louis to St. Thomas, returning Sat, Oct 25, priced at $425 found 5 hours ago
Spirit Airlines
Sat, Nov 1 - Fri, Nov 7
STL
St. Louis
STT
St. Thomas
$431 Roundtrip, found 10 hours ago
$431
Roundtrip
found 10 hours ago
Select Spirit Airlines flight, departing Sat, Nov 1 from St. Louis to St. Thomas, returning Fri, Nov 7, priced at $431 found 10 hours ago
Spirit Airlines
Sat, Nov 1 - Mon, Nov 10
STL
St. Louis
STT
St. Thomas
$431 Roundtrip, found 6 days ago
$431
Roundtrip
found 6 days ago
Select Spirit Airlines flight, departing Sat, Nov 1 from St. Louis to St. Thomas, returning Mon, Nov 10, priced at $431 found 6 days ago
Spirit Airlines
Sat, Oct 18 - Thu, Oct 23
STL
St. Louis
STT
St. Thomas
$432 Roundtrip, found 15 hours ago
$432
Roundtrip
found 15 hours ago
Select Spirit Airlines flight, departing Sat, Oct 18 from St. Louis to St. Thomas, returning Thu, Oct 23, priced at $432 found 15 hours ago
Spirit Airlines
Sat, Oct 18 - Sat, Oct 25
STL
St. Louis
STT
St. Thomas
$437 Roundtrip, found 5 hours ago
$437
Roundtrip
found 5 hours ago
Select Spirit Airlines flight, departing Sat, Oct 18 from St. Louis to St. Thomas, returning Sat, Oct 25, priced at $437 found 5 hours ago
Delta
Sat, Oct 4 - Sat, Oct 11
STL
St. Louis
STT
St. Thomas
$478 Roundtrip, found 5 hours ago
$478
Roundtrip
found 5 hours ago
Select Delta flight, departing Sat, Oct 4 from St. Louis to St. Thomas, returning Sat, Oct 11, priced at $478 found 5 hours ago
Southwest Airlines
Thu, Feb 19 - Thu, Feb 26
STL
St. Louis
STT
St. Thomas
$523 Roundtrip, found 13 hours ago
$523
Roundtrip
found 13 hours ago
Select Southwest Airlines flight, departing Thu, Feb 19 from St. Louis to St. Thomas, returning Thu, Feb 26, priced at $523 found 13 hours ago

Find the cheapest month to fly from St. Louis (STL) to St. Thomas (STT)

April is typically the cheapest month to fly

From $191 - $698 per traveler.

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Cyril E. King Airport (STT) cost?
Snag a cheap one-way flight from $135 or cheap return flight from $256 from Lambert-St. Louis Intl. Airport (STL) to Cyril E. King Airport (STT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Cyril E. King Airport (STT)?
The cheapest month to fly from STL to STT is October, when demand is low. Off-peak season is typically when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Cyril E. King Airport (STT)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest STL to STT flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Cyril E. King Airport (STT)?
You'll need to hop on a flight with a layover if you're traveling from Lambert-St. Louis Intl. Airport (STL) to Cyril E. King Airport (STT). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from STL to STT?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Cyril E. King Airport (STT)?
To arrive at Cyril E. King Airport (STT) on time, book a flight that leaves from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Cyril E. King Airport (STT) last-minute?
Booking your ticket from STL to STT shortly before your trip is typically more expensive. However, if you're flexible with your itinerary, you could land a cheap last-minute fare.
Is it cheaper to book a STL to STT flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to STT flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one place will take the stress out of planning your trip. Just pick your flights and select from our extensive range of stays, then tailor your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Cyril E. King Airport (STT)?
It's generally possible to cancel or reschedule your STL to STT flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Cyril E. King
Airlines serving
American Airlines, Delta, Southwest Airlines, Spirit Airlines, United
Roundtrip price
$255
Distance
2075 mi

Book with confidence

Book with confidence

St. Louis to St. Thomas Flights

The cheapest times to fly from St. Louis to St. Thomas

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to St. Thomas are during the month of October. You can find some of the cheapest flights from St. Louis to St. Thomas with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to St. Thomas

Sunday is one of the best days to book for cheap flights from St. Louis to St. Thomas: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to St. Thomas

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to St. Thomas in 2025. You can also book with separate airlines for your outbound and return journeys, from $135 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to St. Thomas flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to St. Thomas airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to St. Thomas Flights

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*Available to One Key members.