$223 Cheap Flights from Phoenix (PHX) to St. Thomas (STT)

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Phoenix to St. Thomas Flights

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

The best time to book a flight from Phoenix to St. Thomas

Sunday is one of the best days to book for cheap flights from Phoenix 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 Phoenix 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 Phoenix to St. Thomas in 2026. You can also book with separate airlines for your outbound and return journeys, from $223 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 Phoenix 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 Phoenix 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 Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King) cost?

You can find cheap one-way flights from $223 and cheap return flights $450 Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King) with Expedia. One-way flights usually range from $270 to $1434, and return flights typically cost between $635 and $3615. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King) ticket fares go up or down.

*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.

What is the cheapest month to fly from Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King)?

January is the cheapest month to fly from Phoenix, AZ (PHX) to St. Thomas (STT), with average round-trip fares around $604. This fare is about 14% lower than the average price throughout the year, as January often sees a dip in travel demand after the holiday season. Other economical months to consider are February and August.

*Averages based on flights available on Expedia in the last year.

Which airlines fly direct from Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King)?

Enter PHX to STT and your travel dates, then apply the 'Nonstop' filter to see only direct flights.

What is the cheapest airline that flies from Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King)?

Sun Country Airlines is one of the cheapest airlines offering connecting flights from Phoenix (PHX) to St. Thomas (STT), with round-trip tickets starting from around $759. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.

*Prices based on flights available on Expedia in the last year.

How do I find cheap flights from Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King)?

To find a cheap flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

What is the best time to fly from Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King)?

For flights from Phoenix, AZ (PHX) to St. Thomas (STT), January and February are the best months to travel. January offers an average return flight price of about $604, making it a great time to enjoy the beautiful Caribbean weather at a reasonable cost.

*Prices based on flights available on Expedia in the last year.

What is the earliest flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King)?

The earliest flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King) typically departs at around 12:15 AM, operated by American Airlines. This is a seasonal service active in February, giving you a chance to start your vacation early. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.

What are the most popular departure times for flights from Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King)?

The most popular departure times for flights from Phoenix, AZ (PHX) to St. Thomas (STT) are in the late evening, from 9pm to midnight. About 55% of passengers prefer this time window. Many major carriers, including American Airlines, Delta and United Airlines, offer flights during this window. This timing is popular because it allows you to enjoy a full day in Phoenix before your flight.

How long does it take to fly from Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King)?

A flight from PHX to STT with a layover takes around 11 hours, with the route covering approximately 3,075 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.

Can you fly business or first class from Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King)?

Business class seats are offered on the PHX to STT route with JetBlue Airways.

First class is available with Delta Air Lines and United Airlines.

How do I earn miles on a Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King) flight with Expedia?

It's easy to earn miles on a Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

What airports do you fly into for St. Thomas from Sky Harbor Intl. (PHX)?

If you're planning to travel to St. Thomas from Sky Harbor Intl. (PHX), you can fly into Cyril E. King (STT) Some flights may connect through major hubs like San Francisco Intl. (SFO), Denver Intl. (DEN), Los Angeles Intl. (LAX) before reaching St. Thomas. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Is it cheaper to buy a plane ticket from Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King) at the last minute?

Typically, booking a last minute flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.

Is it cheaper to book a Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King) flight and hotel package?

Securing a Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King) St Thomas Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.

Can I cancel or change the date of my flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King)?

If you booked your Phoenix, AZ (PHX-Sky Harbor Intl.) to St. Thomas (STT-Cyril E. King) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.