Cheap Flights from Tri-Cities (TRI) to St. Thomas (SPB)

Popular airlines from Tri-Cities, TN (TRI-Tri-Cities Regional) to St. Thomas (SPB-St. Thomas Seaplane Base)

Alternative airports near St. Thomas

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Cyril E. King STT. Cheapest option available. Flights from $717
STT
Cyril E. King
Cheapest
Flights from $717

Frequently asked questions

How much does a flight from Tri-Cities Regional Airport (TRI) to St. Thomas Seaplane Base Airport (SPB) cost?
Snag a cheap one-way flight or cheap return flight from Tri-Cities Regional Airport (TRI) 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 Tri-Cities Regional Airport (TRI) to St. Thomas Seaplane Base Airport (SPB)?
The cheapest month to fly from TRI to SPB is , when there's less demand. Off-peak months are typically when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Tri-Cities Regional Airport (TRI) to St. Thomas Seaplane Base Airport (SPB)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest TRI to SPB flight.
How many flights per day from Tri-Cities Regional Airport (TRI) to St. Thomas Seaplane Base Airport (SPB)?
There aren't any daily nonstop flights departing from Tri-Cities Regional Airport (TRI) to St. Thomas Seaplane Base Airport (SPB). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way in no time.
What day of the week has the most flights from TRI to SPB?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* However, this can change based on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Tri-Cities Regional Airport (TRI) to St. Thomas Seaplane Base Airport (SPB)?
To avoid potential delays on the Tri-Cities Regional Airport (TRI) to St. Thomas Seaplane Base Airport (SPB) route, fly before 3 PM. Later flights 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 Tri-Cities Regional Airport (TRI) to St. Thomas Seaplane Base Airport (SPB) last-minute?
Last-minute fares from TRI to SPB are generally more expensive. To lock in the cheapest rates, start looking for flights well in advance. That said, if you're flexible with your travel dates, it's possible to find a cheap ticket right before your journey.
Is it cheaper to book a TRI to SPB flight and hotel package?
You'll generally save money by booking a TRI 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 it all in one place. After selecting your preferred accommodations and flights, consider adding extras including car rentals, activities and tours.
Can I cancel or change the date of my flight from Tri-Cities Regional Airport (TRI) to St. Thomas Seaplane Base Airport (SPB)?
In most instances, you're able to reschedule or cancel your TRI to SPB flight. However, additional fees may apply, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you'd like more information, go to our Customer Service portal.

Travel information

Origin airport
Tri-Cities Regional
Destination airport
St. Thomas Seaplane Base
Distance
1643 mi

Book with confidence

Tri-Cities to St. Thomas Flights

The cheapest times to fly from Tri-Cities 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 Tri-Cities to St. Thomas are during the month of . You can find some of the cheapest flights from Tri-Cities to St. Thomas with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Tri-Cities to St. Thomas

Sunday is one of the best days to book for cheap flights from Tri-Cities 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 Tri-Cities 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 Tri-Cities 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 Tri-Cities 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 Tri-Cities 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.

 

Tri-Cities to St. Thomas Flights
*Available to One Key members.