ONT - STT

$347 Find Cheap Flights from Ontario to Saint Thomas Island

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Saint Thomas Island departing on 10/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Saint Thomas Island

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Saint Thomas Island, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Saint Thomas Island, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$624
Delta
Thu 8/13Thu 8/20
ONT - STT • 1 stop
Cheapest one-way
$347
American Airlines
Wed 10/21
ONT - STT • 2 stops
Top airlines
Delta
Cheapest • from $624 (round-trip)
American Airlines
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Saint Thomas Island. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Charlotte (CLT)
Cheapest • Avg $748 (round-trip)
Charlotte (CLT)
Shortest trip • 9h 22m (one-way)
Insights
Insights
Insights
Insights
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Saint Thomas Island!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Saint Thomas Island (ONT-STT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Saint Thomas Island that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Saint Thomas Island

Thu, Aug 13 - Thu, Aug 20
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
$624Delta
Mon, Aug 17 - Thu, Aug 20
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
$644Delta
Mon, Jul 6 - Fri, Jul 10
American Airlines Logo
7:14 pm - 12:59 pm
ONT
-
STT
14h 45m
2 stops
American Airlines Logo
4:50 pm - 11:45 am
STT
-
ONT
21h 55m
2 stops
$688American Airlines
Fri, Sep 11 - Fri, Sep 18
American Airlines Logo
1:31 pm - 12:50 pm
ONT
-
STT
20h 19m
2 stops
American Airlines Logo
1:50 pm - 9:29 am
STT
-
ONT
22h 39m
2 stops
$714American Airlines
Fri, May 29 - Tue, Jun 2
American Airlines Logo
7:12 pm - 4:17 pm
ONT
-
STT
18h 05m
2 stops
American Airlines Logo
11:52 am - 9:57 pm
STT
-
ONT
13h 05m
2 stops
$720American Airlines
Sun, Jul 5 - Fri, Jul 10
American Airlines Logo
12:59 am - 4:06 pm
ONT
-
STT
12h 07m
1 stop
American Airlines Logo
11:43 am - 10:34 pm
STT
-
ONT
13h 51m
1 stop
$754American Airlines
Mon, Jun 1 - Fri, Jun 5
American Airlines Logo
7:12 pm - 1:47 pm
ONT
-
STT
15h 35m
2 stops
American Airlines Logo
4:57 pm - 12:04 pm
STT
-
ONT
22h 07m
2 stops
$760American Airlines
Thu, Oct 29 - Sun, Nov 1
American Airlines Logo
1:31 pm - 10:40 am
ONT
-
STT
18h 09m
2 stops
American Airlines Logo
12:28 pm - 9:11 pm
STT
-
ONT
12h 43m
1 stop
$794American Airlines
Fri, Sep 11 - Fri, Sep 18
American Airlines Logo
11:03 pm - 2:35 pm
ONT
-
STT
12h 32m
1 stop
American Airlines Logo
1:50 pm - 9:29 am
STT
-
ONT
22h 39m
2 stops
$860American Airlines
Mon, Jun 15 - Fri, Jun 19
American Airlines Logo
10:00 pm - 11:03 am
ONT
-
STT
10h 03m
1 stop
American Airlines Logo
11:44 am - 9:57 pm
STT
-
ONT
13h 13m
2 stops
$868American Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Saint Thomas Island flights

Get data-powered insights and trends into flights from Ontario to Saint Thomas Island to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Ontario to Saint Thomas Island?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Ontario to Saint Thomas Island were found on Delta ($624) and American Airlines ($688).

Find deals

Good to know

Cheapest flight$347
Flight from Ontario to Saint Thomas Island

When to book flights from Ontario to Saint Thomas Island

Are your dates flexible? Find out the best times to travel from Ontario to Saint Thomas Island based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Saint Thomas Island

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

    In the last 3 days, the lowest price for a flight from Ontario to Saint Thomas Island was $347 for a one-way ticket and $624 for a round-trip.

  • Do I need a passport to fly between Ontario and Saint Thomas Island?

    A passport is required to fly from Ontario to Saint Thomas Island.

  • Which aircraft models fly most regularly from Ontario to Saint Thomas Island?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Saint Thomas Island?

    oneworld is the only airline alliance operating flights between Ontario and Saint Thomas Island.

  • How does KAYAK find such low prices on flights from Ontario to Saint Thomas Island?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Saint Thomas Island.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Saint Thomas Island?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Saint Thomas Island from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Saint Thomas Island?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Saint Thomas Island with an airline and back to Ontario with another airline. Booking your flights between Ontario and STT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Saint Thomas Island?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Saint Thomas Island from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to Saint Thomas Island

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Saint Thomas Island. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Saint Thomas Island? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
American AirlinesOverall score based on 11648 reviews
7.9Crew
6.9Entertainment
7.5Boarding
7.2Comfort
6.4Food
Airline reviews

Premium Economy Good crew, good service, excellent food. Seat back screen just not bright enough.

8.0 ExcellentT, May 2026
SFO - LHR
Read more American Airlines reviews

Premium Economy Good crew, good service, excellent food. Seat back screen just not bright enough.

The crew was very attentive through out the flight. Seats were comfortable, nice flight bag with pillow and blanket. Food was okay, since it was a overnight flight seemed to go by fast.

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

Boarding gate at LAX was too crowded—two gates next to one another

On time departure and early arrival. Flight attendant very nice.

The business class layout of chairs was weired. You are sitting directly across stranger.,

The SFO Lounge crew were amazing. The bartender Faris was great. Thanks!

Friendly crew is the only nice thing. Seats uncomfortable. Food and snacks horrible. Movies were the same as the first 10 hour flight two weeks before

Was not able to do a online check-in because the American Airlines system doesn't store our visa or other passport information, allowing us to have a trouble-free check-in. We were forced to have to check-in at the counter which Changes are upgrade status given that we were not able to check in much earlier.

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

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

Information on your arrival and departure airports

Ontario (ONT)
Saint Thomas Island (STT)