$221 Cheap Flights from San Francisco (SFO) to St. Thomas (STT)

View $221 flight on Tue, Nov 4, 2025Opens in a new window

Popular airlines from San Francisco Intl. Airport (SFO) to Cyril E. King Airport (STT)

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Cheap Flights from San Francisco to St. Thomas (SFO-STT)

Prices were available within the past 7 days and start at $221 for one-way flights and $437 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Mon, Oct 27 - Fri, Oct 31
SFO
San Francisco
STT
St. Thomas
$437 Roundtrip, found 1 day ago
$437
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Mon, Oct 27 from San Francisco to St. Thomas, returning Fri, Oct 31, priced at $437 found 1 day ago
JetBlue Airways
Mon, Jan 19 - Tue, Jan 27
SFO
San Francisco
STT
St. Thomas
$451 Roundtrip, found 14 hours ago
$451
Roundtrip
found 14 hours ago
Select JetBlue Airways flight, departing Mon, Jan 19 from San Francisco to St. Thomas, returning Tue, Jan 27, priced at $451 found 14 hours ago
JetBlue Airways
Sun, Mar 1 - Wed, Mar 18
SFO
San Francisco
STT
St. Thomas
$457 Roundtrip, found 1 day ago
$457
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Sun, Mar 1 from San Francisco to St. Thomas, returning Wed, Mar 18, priced at $457 found 1 day ago
JetBlue Airways
Tue, Mar 3 - Tue, Mar 10
SFO
San Francisco
STT
St. Thomas
$459 Roundtrip, found 2 days ago
$459
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Mar 3 from San Francisco to St. Thomas, returning Tue, Mar 10, priced at $459 found 2 days ago
JetBlue Airways
Mon, Feb 2 - Mon, Feb 9
SFO
San Francisco
STT
St. Thomas
$461 Roundtrip, found 6 days ago
$461
Roundtrip
found 6 days ago
Select JetBlue Airways flight, departing Mon, Feb 2 from San Francisco to St. Thomas, returning Mon, Feb 9, priced at $461 found 6 days ago
JetBlue Airways
Fri, Jan 16 - Thu, Jan 22
SFO
San Francisco
STT
St. Thomas
$464 Roundtrip, found 4 days ago
$464
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Fri, Jan 16 from San Francisco to St. Thomas, returning Thu, Jan 22, priced at $464 found 4 days ago
Southwest Airlines
Sat, Feb 21 - Sun, Mar 1
SFO
San Francisco
STT
St. Thomas
$545 Roundtrip, found 18 hours ago
$545
Roundtrip
found 18 hours ago
Select Southwest Airlines flight, departing Sat, Feb 21 from San Francisco to St. Thomas, returning Sun, Mar 1, priced at $545 found 18 hours ago
American Airlines
Sun, Jan 4 - Thu, Jan 15
SFO
San Francisco
STT
St. Thomas
$609 Roundtrip, just found
$609
Roundtrip
just found
Select American Airlines flight, departing Sun, Jan 4 from San Francisco to St. Thomas, returning Thu, Jan 15, priced at $609 just found
Delta
Sun, Jan 4 - Thu, Jan 15
SFO
San Francisco
STT
St. Thomas
$609 Roundtrip, just found
$609
Roundtrip
just found
Select Delta flight, departing Sun, Jan 4 from San Francisco to St. Thomas, returning Thu, Jan 15, priced at $609 just found
United
Mon, Dec 15 - Tue, Dec 23
SFO
San Francisco
STT
St. Thomas
$609 Roundtrip, found 13 hours ago
$609
Roundtrip
found 13 hours ago
Select United flight, departing Mon, Dec 15 from San Francisco to St. Thomas, returning Tue, Dec 23, priced at $609 found 13 hours ago

Find the cheapest month to fly from San Francisco (SFO) to St. Thomas (STT)

January is typically the cheapest month to fly

From $388 - $845 per traveler.
Flights from San Francisco (SFO) to St. Thomas (STT)
Origin airport
San Francisco Intl.
Destination airport
Cyril E. King
Airlines serving
American Airlines, Delta, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$436
Distance
3685 mi

San Francisco to St. Thomas Flights

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

 

The best time to book a flight from San Francisco to St. Thomas

Sunday is one of the best days to book for cheap flights from San Francisco 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 San Francisco 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 San Francisco to St. Thomas in 2025. You can also book with separate airlines for your outbound and return journeys, from $221 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 San Francisco 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 San Francisco 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 San Francisco Intl. Airport (SFO) to Cyril E. King Airport (STT) cost?
Grab a cheap one-way flight from $221 or cheap return flight from $437 from San Francisco Intl. Airport (SFO) to Cyril E. King Airport (STT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from San Francisco Intl. Airport (SFO) to Cyril E. King Airport (STT)?
October is the least expensive month to fly from SFO to STT. Traveling during quieter months is often the key to finding better fares.
What is the cheapest airline that flies from San Francisco Intl. Airport (SFO) to Cyril E. King Airport (STT)?
To find the cheapest airline that'll fly you from SFO to STT, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from San Francisco Intl. Airport (SFO) to Cyril E. King Airport (STT)?
You'll need to catch a flight with a layover if you're traveling from San Francisco Intl. Airport (SFO) to Cyril E. King Airport (STT). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from SFO to STT?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* However, this can change based on the airline, season 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 San Francisco Intl. Airport (SFO) to Cyril E. King Airport (STT)?
Book a flight from San Francisco Intl. Airport (SFO) to Cyril E. King Airport (STT) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this hour are on average 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 San Francisco Intl. Airport (SFO) to Cyril E. King Airport (STT) last-minute?
Waiting until just before your trip to book a ticket from SFO to STT often results in higher prices. While you may find some last-minute discounts, there's no guarantee. Be flexible with your itinerary to boost your chances of scoring a bargain.
Is it cheaper to book a SFO to STT flight and hotel package?
Compared with arranging hotels and flights separately, booking a SFO to STT flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one convenient place takes the hassle out of travel planning. Just secure your flights and select from our wide range of hotels, then personalize your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to Cyril E. King Airport (STT)?
You can usually cancel or reschedule your SFO to STT flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.