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

Popular airlines from St. Louis, MO (CPS-St. Louis Downtown) to St. Thomas (SPB-St. Thomas Seaplane Base)

Frequently asked questions

How much does a flight from St. Louis Downtown Airport (CPS) to St. Thomas Seaplane Base Airport (SPB) cost?
Lock in a cheap one-way flight or cheap return flight from St. Louis Downtown Airport (CPS) to St. Thomas Seaplane Base Airport (SPB) 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 St. Louis Downtown Airport (CPS) to St. Thomas Seaplane Base Airport (SPB)?
is the least expensive month to fly from CPS to SPB. Avoiding peak travel times is often the key to scoring lower fares.
What is the cheapest airline that flies from St. Louis Downtown Airport (CPS) to St. Thomas Seaplane Base Airport (SPB)?
To find the cheapest airline that'll fly you from CPS to SPB, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from St. Louis Downtown Airport (CPS) to St. Thomas Seaplane Base Airport (SPB)?
Direct flights from St. Louis Downtown Airport (CPS) to St. Thomas Seaplane Base Airport (SPB) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from CPS to SPB?
You'll typically find Tuesday the quietest day for flights, while Fridays are often 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 St. Louis Downtown Airport (CPS) to St. Thomas Seaplane Base Airport (SPB)?
To avoid potential delays on the St. Louis Downtown Airport (CPS) to St. Thomas Seaplane Base Airport (SPB) route, aim to fly before 3 PM. Later flights are 22% more likely to be 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 St. Louis Downtown Airport (CPS) to St. Thomas Seaplane Base Airport (SPB) last-minute?
Booking your ticket from CPS to SPB shortly before your trip is typically more expensive. However, if there's some wiggle room with your departure dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a CPS to SPB flight and hotel package?
You'll generally save money by securing a CPS to SPB flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. Once you've chosen your preferred accommodations and flights, consider adding extras including activities, car rentals and tours.
Can I cancel or change the date of my flight from St. Louis Downtown Airport (CPS) to St. Thomas Seaplane Base Airport (SPB)?
Usually, it's possible to cancel or reschedule your CPS to SPB flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Travel information

Origin airport
St. Louis Downtown
Destination airport
St. Thomas Seaplane Base
Distance
2060 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 . 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.

 

St. Louis to St. Thomas Flights
*Available to One Key members.