What are the cheapest airlines flying from Ontario to Saint Thomas Island round-trip?

Currently priced at $535, Delta will fly you from Ontario to Saint Thomas Island and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and American Airlines - these airlines can fly you to your destination from $677 and $772, respectively. Users have found that Delta is 35% cheaper than the other options available to this destination.

What is the cheapest day to fly from Ontario to Saint Thomas Island?

Travelers seeking maximum savings on their Ontario to Saint Thomas Island flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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

Flights from Ontario to Saint Thomas Island are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Saint Thomas Island.

How far in advance should I book a flight from Ontario to Saint Thomas Island?

Find a great deal and save up to 116% by booking at least 23 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Ontario to Saint Thomas Island within the next two weeks, with the cheapest ticket starting at $440.

What is the cheapest month to fly from Ontario to Saint Thomas Island?

Flights from Ontario to Saint Thomas Island lean towards being more expensive in July. Prices are generally better when you fly from Ontario to Saint Thomas Island in February, with the cheapest ticket starting at $294.

Most accurate provider : When it comes to deals on Ontario-Saint Thomas Island flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Ontario-Saint Thomas Island flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Ontario-Saint Thomas Island flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Ontario-Saint Thomas Island flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Saint Thomas Island flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$311+ Flights from Ontario to Saint Thomas Island

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1. Tell us where you want to go

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2. Select your favorite providers

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Cheap flight deals from Ontario to Saint Thomas Island

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$535 (Delta)
One-way from	$311 (United Airlines)
Popular in	November
Cheapest in	September
Average price	$1,115

Provider with most accurate pricing for Ontario-Saint Thomas Island Cyril E King flight deals.

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Provider most trusted by Cheapflights users for Ontario-Saint Thomas Island Cyril E King flights.

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From Ontario to Saint Thomas Island Cyril E King

Search Deals

One-way flight from Ontario to Saint Thomas Island Cyril E King

Search Deals

Highest demand for flights based on searches. 24% potential increase in price ($268 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 13% potential price decrease ($97 potential savings vs. average RT price).

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Average for round-trip flights in April 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 April 15, 2025.

Fri 9/1210:59 pmONT - STT

1 stop11h 40mDelta

Tue 9/232:49 pmSTT - ONT

1 stop10h 52mDelta

Deal found 4/14

$535

Fri 11/78:05 pmONT - STT

2 stops14h 35mAmerican Airlines

Fri 11/144:38 pmSTT - ONT

2 stops20h 06mAmerican Airlines

Deal found 4/15

$580

Fri 6/276:38 pmONT - STT

2 stops15h 30mUnited Airlines

Wed 7/21:19 pmSTT - ONT

1 stop11h 18mUnited Airlines

Deal found 4/14

$677

Best flights from Ontario to Saint Thomas Island
Discover carefully curated flight deals from Ontario to Saint Thomas Island that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 15, 2025.

Fri 9/1210:59 pmONT - STT

1 stop11h 40mDelta

Tue 9/232:49 pmSTT - ONT

1 stop10h 52mDelta

Deal found 4/14

$535

Fri 6/276:38 pmONT - STT

2 stops15h 30mUnited Airlines

Wed 7/21:19 pmSTT - ONT

1 stop11h 18mUnited Airlines

Deal found 4/14

$677

Fri 9/1211:09 pmONT - STT

2 stops10h 41mAmerican Airlines

Tue 9/231:50 pmSTT - ONT

3 stops12h 46mAmerican Airlines

Deal found 4/14

$772

Last-minute flights from Ontario to Saint Thomas Island
Discover last-minute flight deals from Ontario to Saint Thomas Island. Data last updated April 15, 2025 and is based on user searches.

Fri 4/186:39 pmONT - STT

2 stops18h 04mUnited Airlines

Sun 12/142:15 pmSTT - ONT

2 stops23h 44mUnited Airlines

Deal found 4/14

$917

Mon 4/216:10 amONT - STT

2 stops27h 51mUnited Airlines

Wed 4/304:45 pmSTT - ONT

2 stops22h 39mUnited Airlines

Deal found 4/14

$1,179

Tue 5/67:25 pmONT - STT

2 stops17h 55mAmerican Airlines

Sun 5/115:10 pmSTT - ONT

2 stops19h 40mAmerican Airlines

Deal found 4/15

$1,178

Sun 5/1810:00 pmONT - STT

1 stop12h 41mDelta

Tue 6/32:51 pmSTT - ONT

1 stop10h 38mDelta

Deal found 4/15

$709

One-way flights from Ontario to Saint Thomas Island
Search for one-way flight options from Ontario to Saint Thomas Island. Find affordable one-way fares based on user searches. Data last updated April 15, 2025.

Mon 7/146:39 pmONT - STT

2 stops14h 38mUnited Airlines

Deal found 4/14

$311

Mon 9/296:04 amONT - STT

2 stops22h 46mMultiple Airlines

Deal found 4/14

$392

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Saint Thomas Island that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Fri 9/12

10:59 pm-1:39 pm

1 stop11h 40m

Saint Thomas Island Cyril E King

Tue 9/23

2:49 pm-10:41 pm

1 stop10h 52m

$535

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Fri 6/27

6:38 pm-1:08 pm

2 stops15h 30m

Saint Thomas Island Cyril E King

Wed 7/2

1:19 pm-9:37 pm

1 stop11h 18m

$677

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Fri 9/12

11:09 pm-12:50 pm

2 stops10h 41m

Saint Thomas Island Cyril E King

Tue 9/23

1:50 pm-11:36 pm

3 stops12h 46m

$772

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Mon 7/14

6:39 pm-12:17 pm

2 stops14h 38m

$311

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Mon 9/29

6:04 am-7:50 am

2 stops22h 46m

$392

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Compare providers for flights from Ontario to Saint Thomas Island

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Saint Thomas Island in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Ontario-Saint Thomas Island flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Ontario-Saint Thomas Island flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Ontario-Saint Thomas Island flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Ontario-Saint Thomas Island flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Saint Thomas Island flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 $640). 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.

What is the cheapest time of day to fly from ONT to STT?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Saint Thomas Island as you normally would.

Reviews of airlines servicing Saint Thomas Island

Delta

8.0

Very good

7,917 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,917 reviews

Delta

8.0

Very good

7,917 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,658 reviews

Delta

8.0

Very good

7,917 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,917 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines flying from Ontario to Saint Thomas Island round-trip?
Currently priced at $535, Delta will fly you from Ontario to Saint Thomas Island and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and American Airlines - these airlines can fly you to your destination from $677 and $772, respectively. Users have found that Delta is 35% cheaper than the other options available to this destination.
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 $640). 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

St. John

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Alternative routes for Ontario to Saint Thomas Island

Complete your trip

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Top airline flying from Ontario to Saint Thomas Island

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$483	Average$1,031	FlexibilityNo cancel fee	On-time71%

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$311+ 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 7/14. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Saint Thomas Island with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Ontario to Saint Thomas Island

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Saint Thomas Island

Cheapest flights from Ontario to Saint Thomas IslandExplore 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 April 15, 2025.

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 April 15, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Saint Thomas Island that are best for you.

Compare providers for flights from Ontario to Saint Thomas Island

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Saint Thomas Island in April.

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.

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?

What is the cheapest time of day to fly from ONT to STT?

Find hourly flight availability from Ontario to Saint Thomas Island. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 15, 2025.

Reviews of airlines servicing Saint Thomas Island

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.

What are the cheapest airlines flying from Ontario to Saint Thomas Island round-trip?

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

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

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

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

Traveling to a place near Ontario?

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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

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Travel Smart

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 April 15, 2025.