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Cheap flights from Ontario to Saint Thomas Island from $421

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 9/20. 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
4:25 pm - 12:17 pm
ONT
-
STT
15h 52m
2 stops
American Airlines Logo
3:15 pm - 9:51 am
STT
-
ONT
22h 36m
2 stops
$528American Airlines
Sun, Nov 1 - Wed, Nov 25
American Airlines Logo
11:59 pm - 2:55 pm
ONT
-
STT
11h 56m
2 stops
American Airlines Logo
3:46 pm - 12:14 pm
STT
-
ONT
23h 28m
2 stops
$563American Airlines
Sun, Oct 18 - Sat, Oct 24
American Airlines Logo
10:30 pm - 3:38 pm
ONT
-
STT
13h 08m
1 stop
American Airlines Logo
3:15 pm - 9:51 am
STT
-
ONT
22h 36m
2 stops
$574American Airlines
Sun, Nov 1 - Wed, Nov 25
American Airlines Logo
7:30 pm - 1:10 pm
ONT
-
STT
13h 40m
2 stops
American Airlines Logo
4:46 pm - 8:57 am
STT
-
ONT
20h 11m
2 stops
$578American Airlines
Sun, Jan 10 - Thu, Jan 14
Delta Logo
3:30 pm - 1:20 pm
ONT
-
STT
17h 50m
2 stops
Delta Logo
1:50 pm - 10:14 pm
STT
-
ONT
12h 24m
1 stop
$603Delta
Sun, Jan 10 - Thu, Jan 14
American Airlines Logo
10:30 pm - 1:13 pm
ONT
-
STT
10h 43m
1 stop
American Airlines Logo
4:33 pm - 11:10 pm
STT
-
ONT
10h 37m
1 stop
$738American Airlines
Sun, Nov 1 - Wed, Nov 25
American Airlines Logo
12:59 pm - 2:59 pm
ONT
-
STT
23h 00m
2 stops
American Airlines Logo
1:49 pm - 11:43 am
STT
-
ONT
24h 54m
2 stops
$797American Airlines
Wed, Sep 2 - Mon, Sep 7
Multiple Airlines Logo
5:00 am - 4:15 pm
ONT
-
STT
32h 15m
2 stops
Multiple Airlines Logo
5:40 pm - 8:58 pm
STT
-
ONT
30h 18m
2 stops
$846Multiple Airlines
Tue, Sep 29 - Tue, Oct 13
Delta Logo
10:00 pm - 1:34 pm
ONT
-
STT
12h 34m
1 stop
Delta Logo
2:49 pm - 9:52 pm
STT
-
ONT
10h 03m
1 stop
$854Delta
Fri, Aug 21 - Thu, Sep 3
American Airlines Logo
7:34 pm - 12:39 pm
ONT
-
STT
14h 05m
2 stops
American Airlines Logo
1:19 pm - 10:59 pm
STT
-
ONT
12h 40m
1 stop
$898American Airlines
Sun, Oct 18 - Sat, Oct 24

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American Airlines flights from Ontario to Saint Thomas Island

Our best American Airlines deals on Ontario to Saint Thomas Island flight tickets
American Airlines
Nov 1
ONT4:25 pmOntario
15h 52m
2 stops
STT12:17 pmSaint Thomas Island Cyril E King
Nov 25
STT3:15 pmSaint Thomas Island Cyril E King
22h 36m
2 stops
ONT9:51 amOntario
$528
American Airlines
Oct 18
ONT11:59 pmOntario
11h 56m
2 stops
STT2:55 pmSaint Thomas Island Cyril E King
Oct 24
STT3:46 pmSaint Thomas Island Cyril E King
23h 28m
2 stops
ONT12:14 pmOntario
$563
American Airlines
Nov 1
ONT10:30 pmOntario
13h 08m
1 stop
STT3:38 pmSaint Thomas Island Cyril E King
Nov 25
STT3:15 pmSaint Thomas Island Cyril E King
22h 36m
2 stops
ONT9:51 amOntario
$574

Delta flights from Ontario to Saint Thomas Island

Our best Delta deals on Ontario to Saint Thomas Island flight tickets
Delta
Jan 10
ONT3:30 pmOntario
17h 50m
2 stops
STT1:20 pmSaint Thomas Island Cyril E King
Jan 14
STT1:50 pmSaint Thomas Island Cyril E King
12h 24m
1 stop
ONT10:14 pmOntario
$603
Delta
Aug 21
ONT10:00 pmOntario
12h 34m
1 stop
STT1:34 pmSaint Thomas Island Cyril E King
Sep 3
STT2:49 pmSaint Thomas Island Cyril E King
10h 03m
1 stop
ONT9:52 pmOntario
$854
Delta
Dec 24
ONT10:59 pmOntario
9h 41m
1 stop
STT12:40 pmSaint Thomas Island Cyril E King
Dec 31
STT4:15 pmSaint Thomas Island Cyril E King
9h 59m
1 stop
ONT10:14 pmOntario
$1,171

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 July 30, 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

Sun 11/1

4:25 pm-12:17 pm

2 stops15h 52m

Saint Thomas Island Cyril E King

Wed 11/25

3:15 pm-9:51 am

2 stops22h 36m

$528

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sun 10/18

11:59 pm-2:55 pm

2 stops11h 56m

Saint Thomas Island Cyril E King

Sat 10/24

3:46 pm-12:14 pm

2 stops23h 28m

$563

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sun 11/1

10:30 pm-3:38 pm

1 stop13h 08m

Saint Thomas Island Cyril E King

Wed 11/25

3:15 pm-9:51 am

2 stops22h 36m

$574

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sun 1/10

7:30 pm-1:10 pm

2 stops13h 40m

Saint Thomas Island Cyril E King

Thu 1/14

4:46 pm-8:57 am

2 stops20h 11m

$578

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sun 1/10

3:30 pm-1:20 pm

2 stops17h 50m

Saint Thomas Island Cyril E King

Thu 1/14

1:50 pm-10:14 pm

1 stop12h 24m

$603
Quickest round-trip

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sun 11/1

10:30 pm-1:13 pm

1 stop10h 43m

Saint Thomas Island Cyril E King

Wed 11/25

4:33 pm-11:10 pm

1 stop10h 37m

$738

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Wed 9/2

12:59 pm-2:59 pm

2 stops23h 00m

Saint Thomas Island Cyril E King

Mon 9/7

1:49 pm-11:43 am

2 stops24h 54m

$797

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Tue 9/29

5:00 am-4:15 pm

2 stops32h 15m

Saint Thomas Island Cyril E King

Tue 10/13

5:40 pm-8:58 pm

2 stops30h 18m

$846

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Fri 8/21

10:00 pm-1:34 pm

1 stop12h 34m

Saint Thomas Island Cyril E King

Thu 9/3

2:49 pm-9:52 pm

1 stop10h 03m

$854

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sun 10/18

7:34 pm-12:39 pm

2 stops14h 05m

Saint Thomas Island Cyril E King

Sat 10/24

1:19 pm-10:59 pm

1 stop12h 40m

$898

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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?

American Airlines 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, 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

11h 20m

Direct flights

None
The fastest flight from Ontario to Saint Thomas Island takes 11h 20m
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 11h 20m.

  • 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
11,848 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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