Cheap flights from Illinois to Saint Thomas Island from $240

The month of April is another great option to travel to Saint Thomas Island, with average flight prices from Illinois averaging around $622.

On average, the least expensive day to fly to Saint Thomas Island from Illinois is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $571. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to Saint Thomas Island for around $809.

Fly from Chicago O'Hare Intl to Saint Thomas Island Cyril E King for the best Illinois - Saint Thomas Island Cyril E King flight prices

You are more likely to see cheaper flights to Saint Thomas Island from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Saint Thomas Island for around $726 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Saint Thomas Island from Illinois for as low as $629 on momondo.

There are 4 cabin classes available to choose from on Illinois to Saint Thomas Island flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 42% on your flight if you consider stops on a Illinois to Saint Thomas Island flight.

Southwest, JetBlue, and United Airlines are the most popular carriers operating from Illinois to Saint Thomas Island Cyril E King

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Saint Thomas Island from Illinois according to our data. American Airlines is the first choice among our users, with 59% of people opting to fly with this airline when traveling to Saint Thomas Island. Keep in mind that there are 3 different airlines that fly to Saint Thomas Island on a routine basis, so you have a few additional options to choose from.

As of November 2026, there are 2 flights per week flying from Illinois to Saint Thomas Island. The most common day of the week flights depart is Sat, with 50% of flights taking off on this day.

Average flight duration from Illinois to Saint Thomas Island depends on which airport you fly into and out of. Flying from Chicago to Saint Thomas Island is 5h 46m on average, while flying from Moline to Saint Thomas Island is 7h 39m on average. Saint Thomas Island is the most popular airport in Saint Thomas Island.