Cheap Flights from St. Louis (STL) to St. Thomas (SPB)

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Flights from St. Louis (STL) to St. Thomas (SPB)
Origin airport
Lambert-St. Louis Intl.
Destination airport
St. Thomas Seaplane Base
Distance
2076 mi

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 . 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 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.

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to St. Thomas Seaplane Base Airport (SPB) cost?
Discover the latest flight deals from STL to SPB by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from STL to SPB?
The cheapest flights from STL to SPB are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from STL to SPB?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from STL to SPB. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to St. Thomas Seaplane Base Airport (SPB)?
There are no daily direct flights departing from Lambert-St. Louis Intl. Airport (STL) to St. Thomas Seaplane Base Airport (SPB). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you’ll be on your way in no time at all.
What day of the week has the most flights from STL to SPB?
You’ll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*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 St. Thomas Seaplane Base Airport (SPB)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to St. Thomas Seaplane Base Airport (SPB) route, travel before 3 PM. Flights after this time have a 22% higher chance of being canceled.**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 St. Thomas Seaplane Base Airport (SPB) last-minute?
Booking your ticket from STL to SPB just before your journey is typically more expensive. However, if there’s some wiggle room with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a STL to SPB flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to SPB flight and hotel package with Expedia could lead to significant savings. What’s more, having it all in one place will take the stress out of travel planning. Simply secure your flights and choose from our extensive range of stays, then customize 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 St. Thomas Seaplane Base Airport (SPB)?
In most instances, you can cancel or reschedule your STL to SPB flight. However, there may be additional fees, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline’s guidelines and fees on flight changes, or if you need further details, head to our Customer Service portal.

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*Available to One Key members.