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Cheap flights from Ontario to Saint Thomas Island from $272

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 4/6. 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

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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
10:26 pm - 10:47 am
ONT
-
STT
9h 21m
1 stop
American Airlines Logo
1:15 pm - 9:07 pm
STT
-
ONT
10h 52m
1 stop
$568American Airlines
Tue, Apr 21 - Wed, Apr 29
American Airlines Logo
2:08 pm - 11:35 am
ONT
-
STT
18h 27m
2 stops
American Airlines Logo
4:48 pm - 11:50 am
STT
-
ONT
22h 02m
2 stops
$597American Airlines
Sat, May 16 - Sun, May 24
Southwest Logo
6:35 pm - 1:45 pm
ONT
-
STT
16h 10m
2 stops
Southwest Logo
2:45 pm - 9:05 am
STT
-
ONT
21h 20m
2 stops
$624Southwest
Tue, Jun 16 - Thu, Jun 18
American Airlines Logo
10:26 pm - 10:47 am
ONT
-
STT
9h 21m
1 stop
American Airlines Logo
4:48 pm - 11:50 am
STT
-
ONT
22h 02m
2 stops
$646American Airlines
Sat, May 16 - Sun, May 24
American Airlines Logo
10:10 pm - 11:03 am
ONT
-
STT
9h 53m
1 stop
American Airlines Logo
1:34 pm - 11:59 pm
STT
-
ONT
13h 25m
2 stops
$668American Airlines
Mon, May 25 - Thu, May 28
American Airlines Logo
10:10 pm - 11:03 am
ONT
-
STT
9h 53m
1 stop
American Airlines Logo
1:34 pm - 11:59 pm
STT
-
ONT
13h 25m
2 stops
$673American Airlines
Wed, May 27 - Thu, May 28
American Airlines Logo
7:59 pm - 2:46 pm
ONT
-
STT
15h 47m
2 stops
American Airlines Logo
5:05 pm - 11:34 am
STT
-
ONT
21h 29m
2 stops
$698American Airlines
Fri, Apr 3 - Tue, Apr 7
Delta Logo
10:25 pm - 11:38 am
ONT
-
STT
10h 13m
1 stop
Delta Logo
12:49 pm - 9:00 pm
STT
-
ONT
11h 11m
1 stop
$700Delta
Sun, Mar 22 - Thu, Mar 26
United Airlines Logo
6:49 pm - 3:31 pm
ONT
-
STT
17h 42m
2 stops
United Airlines Logo
2:10 pm - 10:31 pm
STT
-
ONT
11h 21m
1 stop
$707United Airlines
Mon, Apr 20 - Thu, Apr 23
American Airlines Logo
10:10 pm - 1:47 pm
ONT
-
STT
12h 37m
1 stop
American Airlines Logo
11:43 am - 10:36 pm
STT
-
ONT
13h 53m
1 stop
$717American Airlines
Tue, May 26 - Thu, May 28

Southwest flights from Ontario to Saint Thomas Island

Our best Southwest deals on Ontario to Saint Thomas Island flight tickets
Southwest
Jun 16
ONT6:35 pmOntario
16h 10m
2 stops
STT1:45 pmSaint Thomas Island Cyril E King
Jun 18
STT2:45 pmSaint Thomas Island Cyril E King
21h 20m
2 stops
ONT9:05 amOntario
$624
Southwest
Mar 25
ONT4:35 pmOntario
18h 45m
2 stops
STT2:20 pmSaint Thomas Island Cyril E King
Mar 29
STT1:05 pmSaint Thomas Island Cyril E King
13h 35m
2 stops
ONT11:40 pmOntario
$860
Southwest
Mar 25
ONT9:55 pmOntario
12h 05m
1 stop
STT1:00 pmSaint Thomas Island Cyril E King
Mar 29
STT1:05 pmSaint Thomas Island Cyril E King
14h 05m
2 stops
ONT12:10 amOntario
$960

United Airlines flights from Ontario to Saint Thomas Island

Our best United Airlines deals on Ontario to Saint Thomas Island flight tickets
United Airlines
Apr 20
ONT6:49 pmOntario
17h 42m
2 stops
STT3:31 pmSaint Thomas Island Cyril E King
Apr 23
STT2:10 pmSaint Thomas Island Cyril E King
11h 21m
1 stop
ONT10:31 pmOntario
$707
United Airlines
Apr 8
ONT6:49 pmOntario
17h 42m
2 stops
STT3:31 pmSaint Thomas Island Cyril E King
Apr 15
STT2:10 pmSaint Thomas Island Cyril E King
11h 21m
1 stop
ONT10:31 pmOntario
$736
United Airlines
Apr 20
ONT6:49 pmOntario
17h 42m
2 stops
STT3:31 pmSaint Thomas Island Cyril E King
Apr 23
STT2:10 pmSaint Thomas Island Cyril E King
11h 21m
1 stop
ONT10:31 pmOntario
$756

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 March 11, 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
Quickest round-trip

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Tue 4/21

10:26 pm-10:47 am

1 stop9h 21m

Saint Thomas Island Cyril E King

Wed 4/29

1:15 pm-9:07 pm

1 stop10h 52m

$568

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sat 5/16

2:08 pm-11:35 am

2 stops18h 27m

Saint Thomas Island Cyril E King

Sun 5/24

4:48 pm-11:50 am

2 stops22h 02m

$597

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Tue 6/16

6:35 pm-1:45 pm

2 stops16h 10m

Saint Thomas Island Cyril E King

Thu 6/18

2:45 pm-9:05 am

2 stops21h 20m

$624

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sat 5/16

10:26 pm-10:47 am

1 stop9h 21m

Saint Thomas Island Cyril E King

Sun 5/24

4:48 pm-11:50 am

2 stops22h 02m

$646

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Mon 5/25

10:10 pm-11:03 am

1 stop9h 53m

Saint Thomas Island Cyril E King

Thu 5/28

1:34 pm-11:59 pm

2 stops13h 25m

$668

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Wed 5/27

10:10 pm-11:03 am

1 stop9h 53m

Saint Thomas Island Cyril E King

Thu 5/28

1:34 pm-11:59 pm

2 stops13h 25m

$673

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Fri 4/3

7:59 pm-2:46 pm

2 stops15h 47m

Saint Thomas Island Cyril E King

Tue 4/7

5:05 pm-11:34 am

2 stops21h 29m

$698

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sun 3/22

10:25 pm-11:38 am

1 stop10h 13m

Saint Thomas Island Cyril E King

Thu 3/26

12:49 pm-9:00 pm

1 stop11h 11m

$700

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Mon 4/20

6:49 pm-3:31 pm

2 stops17h 42m

Saint Thomas Island Cyril E King

Thu 4/23

2:10 pm-10:31 pm

1 stop11h 21m

$707

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Tue 5/26

10:10 pm-1:47 pm

1 stop12h 37m

Saint Thomas Island Cyril E King

Thu 5/28

11:43 am-10:36 pm

1 stop13h 53m

$717

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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 is the cheapest airline that flies from Ontario to Saint Thomas Island Cyril E King?

Delta and United Airlines are the most popular carriers operating from Ontario to Saint Thomas Island Cyril E King

What airlines fly to Saint Thomas Island?

American Airlines, Delta and Spirit Airlines 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 58% 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

10h 13m

Direct flights

None
The fastest flight from Ontario to Saint Thomas Island takes 10h 13m
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

  • 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 10h 13m.

  • 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 $567Free CancellationRating
7.1
11,419 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.

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