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Cheap flights from Ontario to Saint Thomas Island from $406

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Saint Thomas Island departing on 9/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Saint Thomas Island

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
2:22 pm - 12:40 pm
ONT
-
STT
19h 18m
2 stops
American Airlines Logo
11:45 am - 8:04 pm
STT
-
ONT
11h 19m
1 stop
$508American Airlines
Sat, Oct 24 - Wed, Oct 28
American Airlines Logo
11:12 pm - 10:40 am
ONT
-
STT
8h 28m
1 stop
American Airlines Logo
11:45 am - 8:04 pm
STT
-
ONT
11h 19m
1 stop
$554American Airlines
Sat, Oct 24 - Wed, Oct 28
American Airlines Logo
10:29 am - 10:40 am
ONT
-
STT
21h 11m
2 stops
American Airlines Logo
11:45 am - 8:30 am
STT
-
ONT
23h 45m
2 stops
$578American Airlines
Sun, Oct 11 - Fri, Oct 16
American Airlines Logo
10:10 pm - 1:48 pm
ONT
-
STT
12h 38m
1 stop
American Airlines Logo
4:50 pm - 12:02 pm
STT
-
ONT
22h 12m
2 stops
$585American Airlines
Wed, Jul 22 - Tue, Jul 28
American Airlines Logo
10:10 pm - 1:48 pm
ONT
-
STT
12h 38m
1 stop
American Airlines Logo
11:43 am - 9:43 pm
STT
-
ONT
13h 00m
2 stops
$611American Airlines
Sat, Jul 18 - Fri, Jul 24
American Airlines Logo
1:11 pm - 11:03 am
ONT
-
STT
18h 52m
2 stops
American Airlines Logo
4:50 pm - 12:02 pm
STT
-
ONT
22h 12m
2 stops
$681American Airlines
Thu, Jul 16 - Tue, Jul 21
American Airlines Logo
11:12 pm - 10:40 am
ONT
-
STT
8h 28m
1 stop
American Airlines Logo
11:45 am - 8:30 am
STT
-
ONT
23h 45m
2 stops
$707American Airlines
Sun, Oct 11 - Fri, Oct 16
United Airlines Logo
4:03 pm - 1:30 pm
ONT
-
STT
18h 27m
3 stops
United Airlines Logo
12:02 pm - 10:26 pm
STT
-
ONT
13h 24m
2 stops
$735United Airlines
Sat, Oct 24 - Wed, Oct 28
American Airlines Logo
10:10 pm - 11:03 am
ONT
-
STT
9h 53m
1 stop
American Airlines Logo
11:43 am - 10:34 pm
STT
-
ONT
13h 51m
1 stop
$758American Airlines
Wed, Jul 22 - Tue, Jul 28
American Airlines Logo
1:11 pm - 4:21 pm
ONT
-
STT
24h 10m
2 stops
American Airlines Logo
11:43 am - 9:43 pm
STT
-
ONT
13h 00m
2 stops
$777American Airlines
Sat, Jul 18 - Fri, Jul 24

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Delta flights from Ontario to Saint Thomas Island

Our best Delta deals on Ontario to Saint Thomas Island flight tickets
Delta
Aug 24
ONT10:00 pmOntario
12h 34m
1 stop
STT1:34 pmSaint Thomas Island Cyril E King
Aug 28
STT2:49 pmSaint Thomas Island Cyril E King
10h 03m
1 stop
ONT9:52 pmOntario
$806
Delta
Dec 2
ONT10:59 pmOntario
11h 44m
1 stop
STT2:43 pmSaint Thomas Island Cyril E King
Dec 15
STT3:54 pmSaint Thomas Island Cyril E King
10h 20m
1 stop
ONT10:14 pmOntario
$887
Delta
Dec 4
ONT10:59 pmOntario
11h 44m
1 stop
STT2:43 pmSaint Thomas Island Cyril E King
Dec 16
STT3:54 pmSaint Thomas Island Cyril E King
10h 20m
1 stop
ONT10:14 pmOntario
$894

American Airlines flights from Ontario to Saint Thomas Island

Our best American Airlines deals on Ontario to Saint Thomas Island flight tickets
American Airlines
Oct 24
ONT2:22 pmOntario
19h 18m
2 stops
STT12:40 pmSaint Thomas Island Cyril E King
Oct 28
STT11:45 amSaint Thomas Island Cyril E King
11h 19m
1 stop
ONT8:04 pmOntario
$508
American Airlines
Oct 24
ONT11:12 pmOntario
8h 28m
1 stop
STT10:40 amSaint Thomas Island Cyril E King
Oct 28
STT11:45 amSaint Thomas Island Cyril E King
11h 19m
1 stop
ONT8:04 pmOntario
$554
American Airlines
Oct 11
ONT10:29 amOntario
21h 11m
2 stops
STT10:40 amSaint Thomas Island Cyril E King
Oct 16
STT11:45 amSaint Thomas Island Cyril E King
23h 45m
2 stops
ONT8:30 amOntario
$578

momondo 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, momondo users made 832,500 searches. Data last updated June 14, 2026.
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

Cheapest round-trip

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sat 10/24

2:22 pm-12:40 pm

2 stops19h 18m

Saint Thomas Island Cyril E King

Wed 10/28

11:45 am-8:04 pm

1 stop11h 19m

$508
Quickest round-trip

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sat 10/24

11:12 pm-10:40 am

1 stop8h 28m

Saint Thomas Island Cyril E King

Wed 10/28

11:45 am-8:04 pm

1 stop11h 19m

$554

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sun 10/11

10:29 am-10:40 am

2 stops21h 11m

Saint Thomas Island Cyril E King

Fri 10/16

11:45 am-8:30 am

2 stops23h 45m

$578

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Wed 7/22

10:10 pm-1:48 pm

1 stop12h 38m

Saint Thomas Island Cyril E King

Tue 7/28

4:50 pm-12:02 pm

2 stops22h 12m

$585

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sat 7/18

10:10 pm-1:48 pm

1 stop12h 38m

Saint Thomas Island Cyril E King

Fri 7/24

11:43 am-9:43 pm

2 stops13h 00m

$611

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Thu 7/16

1:11 pm-11:03 am

2 stops18h 52m

Saint Thomas Island Cyril E King

Tue 7/21

4:50 pm-12:02 pm

2 stops22h 12m

$681

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sun 10/11

11:12 pm-10:40 am

1 stop8h 28m

Saint Thomas Island Cyril E King

Fri 10/16

11:45 am-8:30 am

2 stops23h 45m

$707

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sat 10/24

4:03 pm-1:30 pm

3 stops18h 27m

Saint Thomas Island Cyril E King

Wed 10/28

12:02 pm-10:26 pm

2 stops13h 24m

$735

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Wed 7/22

10:10 pm-11:03 am

1 stop9h 53m

Saint Thomas Island Cyril E King

Tue 7/28

11:43 am-10:34 pm

1 stop13h 51m

$758

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sat 7/18

1:11 pm-4:21 pm

2 stops24h 10m

Saint Thomas Island Cyril E King

Fri 7/24

11:43 am-9:43 pm

2 stops13h 00m

$777

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
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See travel insights to Saint Thomas Island from

How to get the cheapest flight ticket from Ontario to Saint Thomas Island

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What airlines fly to Saint Thomas Island?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Saint Thomas Island from Ontario according to our data. American Airlines is the first choice among our users, with 70% of people opting to fly with this airline when traveling to Saint Thomas Island. Keep in mind that there are 4 different airlines that fly to Saint Thomas Island on a routine basis, so you have a few additional options to choose from.

When to book flights from Ontario to Saint Thomas Island

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Saint Thomas Island according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Saint Thomas Island (ONT to STT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Saint Thomas Island

Fastest flight time

14h 50m

Direct flights

None
The fastest flight from Ontario to Saint Thomas Island takes 14h 50m
There are no direct flights from Ontario to Saint Thomas Island. There are no popular flight routes from Ontario to Saint Thomas Island.
Search flight deals

Frequently asked questions about flying from Ontario to Saint Thomas Island

  • How far is Ontario to Saint Thomas Island Cyril E King by plane?

    Ontario and Saint Thomas Island Cyril E King are 3401.6 mi apart from one another. A reasonable flight in good conditions will take 14h 50m.

  • When did momondo last update prices for flights from Ontario Airport to Saint Thomas Island Cyril E King Airport?

    Prices for flights from Ontario Airport to Saint Thomas Island Cyril E King Airport are updated daily.

  • How many operators does momondo search for flights from Ontario Airport to Saint Thomas Island Cyril E King Airport?

  • How old do you have to be to fly from Ontario Airport to Saint Thomas Island Cyril E King Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to Saint Thomas Island Cyril E King Airport.

  • What documentation or ID do you need to fly to Saint Thomas Island Cyril E King Airport?

    The necessary travel and health documents for your Saint Thomas Island Cyril E King Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Ontario to Saint Thomas Island?

Best airlines flying from Ontario to Saint Thomas Island

Compare and see reviews for airlines that fly from Ontario to Saint Thomas Island with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $616Free CancellationRating
7.1
11,654 reviews
Search American Airlines flights

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

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Saint Thomas Island?

It is quick and easy to find Ontario to Saint Thomas Island flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Saint Thomas Island that suits you.

Can I find flights from Ontario to Saint Thomas Island with flexible booking policies on momondo?

Yes. All flights to Saint Thomas Island from Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Ontario to Saint Thomas Island?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Saint Thomas Island from Ontario.

I’m not ready to book a flight from Ontario to Saint Thomas Island right now. Can momondo alert me if prices change?

Price alerts on flights to Saint Thomas Island from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Saint Thomas Island trip

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