$328 Cheap Delta flights Philadelphia (PHL) to St. Thomas (STT)

View $328 flight on Wed, Mar 18, 2026Opens in a new window
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$328 Cheap Delta flights Philadelphia (PHL) to St. Thomas (STT)

Prices were available within the past 7 days and start at $328 for one-way flights and $579 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Mar 18 - Tue, Mar 31
PHL
Philadelphia
STT
St. Thomas
$579 Roundtrip, found 1 hour ago
$579
Roundtrip
found 1 hour ago
Select Delta flight, departing Wed, Mar 18 from Philadelphia to St. Thomas, returning Tue, Mar 31, priced at $579 found 1 hour ago

Find the cheapest month to fly from Philadelphia (PHL) to St. Thomas (STT)

February is typically the cheapest month to fly

From $166 - $399 per traveler.

Alternative airports near St. Thomas

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

Select flight to Terrance B. Lettsome Intl. EIS. Flights from $1,114
EIS
Terrance B. Lettsome Intl.
Flights from $1,114
Flights from Philadelphia (PHL) to St. Thomas (STT)
Origin airport
Philadelphia Intl.
Destination airport
Cyril E. King
Airlines serving
American Airlines, Delta, JetBlue Airways, Southwest Airlines, Spirit Airlines, United
Popular airline
Spirit Airlines
Distance
1609 mi
Average flight time
4 hours 3 mins

Frequently asked questions

How much is a Delta Air Lines flight from Philadelphia Intl. Airport (PHL) to Cyril E. King Airport (STT)?
Set the "Price (lowest to highest)" filter on Expedia to find cheap Delta Air Lines return flights from $579 from PHL to STT. Affordable one-way fares from $328 are also on offer.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from PHL to STT with Delta Air Lines?
Delta Air Lines flights to St. Thomas tend to be more affordable in the off-peak months of September and October. Whether you're in search of a one-way or round-trip ticket, you could land a better deal then.
What is the cheapest time to book flights from Philadelphia Intl. Airport (PHL) to Cyril E. King Airport (STT) with Delta Air Lines?
Check for Delta Air Lines flights from PHL to STT about one month before you want to leave. The most affordable time to book an international flight is generally 18 to 29 days ahead of your travel date when you can save 17% versus booking four to five months in advance. No matter your ticket type or itinerary, the best day of the week to book international airfare is usually Sunday. Friday can be the most expensive. Passengers who book on a Sunday can save 17% on average compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Delta Air Lines fly nonstop from Philadelphia Intl. Airport (PHL) to Cyril E. King Airport (STT)?
Enter your dates, click search and use the "Nonstop" filter on Expedia to browse any direct flights from PHL to STT with Delta Air Lines or another carrier.
What is the earliest Delta Air Lines flight from PHL to STT?
Sort your results by "Early Morning" and "Morning" to browse the earliest departures from PHL to STT. Taking off early means you're 20% less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Delta Air Lines fly into in St. Thomas?
Get on a Delta Air Lines flight from Philadelphia Intl. Airport (PHL) to St. Thomas, and you'll probably come in to Cyril E. King Airport (STT). This is the airline's main hub in this destination.
Why fly with Delta Air Lines from PHL to STT?
Delta Air Lines makes traveling from PHL to STT more enjoyable with an excellent in-flight experience and a rewarding loyalty program. You also have the chance to earn points with Delta SkyMiles. Be sure to join Expedia's free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Delta Air Lines flight from Philadelphia Intl. Airport (PHL) to Cyril E. King Airport (STT)?
Depending on your fare type, a fee generally applies if you cancel or reschedule your booking more than 24 hours after it's been confirmed. To secure flexible plane tickets, select our "Changes included" and "No cancel fee" boxes when searching for flights. For more information on canceling or changing your reservation, visit "Trips," select your flight and tick "Manage Booking."

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