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Saint Thomas Island

$229+ Cheap flights from Ontario (ONT) to Saint Thomas Island (STT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — STT
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Ontario to Saint Thomas Island

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Saint Thomas Island (STT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 15, 2025.

Round-trip from

$595
(American Airlines)

One-way from

$229
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$664
From Ontario to Saint Thomas Island Cyril E King
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One-way flight from Ontario to Saint Thomas Island Cyril E King
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Highest demand for flights based on searches. 2% potential increase in price ($18 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Saint Thomas Island

Cheapest flights from Ontario to Saint Thomas Island
Explore the most affordable flight options available from Ontario to Saint Thomas Island. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This American Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/11:00 pmONT - STT
2 stops23h 25mAmerican Airlines
Sun 11/96:17 pmSTT - ONT
2 stops18h 38mAmerican Airlines
Deal found 9/13$705
This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/74:49 pmONT - STT
2 stops17h 00mAmerican Airlines
Sun 10/125:20 pmSTT - ONT
2 stops19h 47mAmerican Airlines
Deal found 9/14$722
This American Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3012:48 pmONT - STT
2 stops22h 57mAmerican Airlines
Sat 11/82:41 pmSTT - ONT
2 stops22h 14mAmerican Airlines
Deal found 9/13$760
This American Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3110:09 amONT - STT
2 stops25h 36mAmerican Airlines
Sat 11/86:17 pmSTT - ONT
2 stops18h 38mAmerican Airlines
Deal found 9/13$784
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/271:40 pmONT - STT
2 stops19h 32mUnited Airlines
Sat 12/63:35 pmSTT - ONT
1 stop10h 14mUnited Airlines
Deal found 9/12$862
This American Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/110:37 pmONT - STT
1 stop10h 08mAmerican Airlines
Sat 11/82:41 pmSTT - ONT
2 stops11h 48mAmerican Airlines
Deal found 9/13$934
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2210:00 pmONT - STT
1 stop12h 33mDelta
Mon 10/62:49 pmSTT - ONT
1 stop10h 33mDelta
Deal found 9/13$941

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Saint Thomas Island that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from Ontario to Saint Thomas Island that are best for you.

Fly from

Ontario

Fly to

Saint Thomas Island

Route

Depart

Return

Price

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sat 11/1

1:00 pm-4:57 pm

2 stops24h 57m

Saint Thomas Island Cyril E King

Sat 11/8

6:17 pm-8:55 am

2 stops18h 38m

$705

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sat 11/1

1:00 pm-3:25 pm

2 stops23h 25m

Saint Thomas Island Cyril E King

Sun 11/9

6:17 pm-8:55 am

2 stops18h 38m

$705

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Tue 10/7

4:49 pm-12:49 pm

2 stops17h 00m

Saint Thomas Island Cyril E King

Sun 10/12

5:20 pm-10:07 am

2 stops19h 47m

$722

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Fri 10/31

10:09 am-2:45 pm

2 stops25h 36m

Saint Thomas Island Cyril E King

Sun 11/9

6:17 pm-8:55 am

2 stops18h 38m

$784

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Thu 11/27

1:40 pm-1:12 pm

2 stops19h 32m

Saint Thomas Island Cyril E King

Sat 12/6

3:35 pm-9:49 pm

1 stop10h 14m

$862

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Mon 9/22

10:00 pm-1:33 pm

1 stop12h 33m

Saint Thomas Island Cyril E King

Mon 10/6

2:49 pm-10:22 pm

1 stop10h 33m

$942

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Wed 10/15

6:53 am-9:56 am

3 stops48h 03m

$229

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sat 11/1

6:38 pm-2:30 pm

2 stops16h 52m

$341

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sun 11/9

10:25 pm-2:40 pm

1 stop12h 15m

$348

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sun 11/2

7:30 pm-12:56 pm

2 stops13h 26m

$453

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 14 results
1
2

Best time to book a flight from Ontario to Saint Thomas Island

Have a flexible travel schedule? Discover the best time to fly to Saint Thomas Island from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Saint Thomas Island

What is the cheapest month to book a flight from Ontario to Saint Thomas Island?

Currently, September is the cheapest month in which you can book a flight from Ontario to Saint Thomas Island (average of $433). Flying from Ontario to Saint Thomas Island in June is currently the most expensive (average of $643). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Saint Thomas Island

Get insights into the airlines that provide service to Saint Thomas Island. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Saint Thomas Island. Reviews last updated September 15, 2025.
Read reviews from past customers who have flown American Airlines from Ontario to Saint Thomas Island. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews

Comfort

7.2

Overall

7.2

Boarding

7.5

Food

6.4

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Comfort

7.2

Overall

7.2

Boarding

7.5

Food

6.4

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

Related info for your journey

Find useful and relevant information for your journey from Ontario to Saint Thomas Island. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Saint Thomas Island?

    There are many flights that can get you from Ontario to Saint Thomas Island in 19h 32m. Fly via American Airlines or United Airlines to get the fastest option. The distance from Ontario to Saint Thomas Island is about 3396 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Ontario to Saint Thomas Island round-trip?

    Currently priced at $493, American Airlines will fly you from Ontario to Saint Thomas Island and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip.

  • What are the cheapest airlines to fly from Ontario to Saint Thomas Island one-way?

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $341. Users have also found prices from $348 and $453 on Delta and American Airlines, respectively.

  • Can I find deals for flights from Ontario to Saint Thomas Island that include hotel bookings?

    Yes. In addition to deals on Ontario to Saint Thomas Island flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Saint Thomas Island?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Saint Thomas Island.

  • Can I find deals for business class flights from Ontario to Saint Thomas Island?

    Yes. Cheapflights offers flight deals from Ontario to Saint Thomas Island by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Saint Thomas Island?

    Currently, September is the cheapest month in which you can book a flight from Ontario to Saint Thomas Island (average of $433). Flying from Ontario to Saint Thomas Island in June is currently the most expensive (average of $643). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Saint Thomas Island?

Book flights to Saint Thomas Island if you plan to visit one of these locations
St. John

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Alternative routes for Ontario to Saint Thomas Island

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Top airline flying from Ontario to Saint Thomas Island

Discover the top airline that operate flights from Ontario to Saint Thomas Island. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$493Average$1,115FlexibilityNo cancel feeOn-time71%

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