ONT - STT

$292 Find Cheap Flights from Ontario to Saint Thomas Island - Compare and Save

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 9/20. 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

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$508
American Airlines
Thu 9/10Mon 9/14
ONT - STT • 2 stops
Cheapest one-way
$292
Delta
Sun 9/20
ONT - STT • 1 stop
Top airlines
American Airlines
Cheapest • from $655 (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
Start a new search
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, Sep 10 - Mon, Sep 14
American Airlines Logo
7:11 pm - 12:51 pm
ONT
-
STT
14h 40m
2 stops
American Airlines Logo
1:41 pm - 9:29 am
STT
-
ONT
22h 48m
2 stops
$508American Airlines
Tue, Sep 15 - Sun, Sep 20
American Airlines Logo
12:37 pm - 12:51 pm
ONT
-
STT
21h 14m
2 stops
American Airlines Logo
1:41 pm - 9:29 am
STT
-
ONT
22h 48m
2 stops
$554American Airlines
Fri, Aug 21 - Thu, Sep 3
American Airlines Logo
12:33 pm - 11:18 am
ONT
-
STT
19h 45m
2 stops
American Airlines Logo
4:42 pm - 9:34 am
STT
-
ONT
19h 52m
2 stops
$655American Airlines
Thu, Sep 10 - Mon, Sep 14
American Airlines Logo
2:22 pm - 12:51 pm
ONT
-
STT
19h 29m
3 stops
American Airlines Logo
1:41 pm - 9:29 am
STT
-
ONT
22h 48m
2 stops
$672American Airlines
Tue, Sep 15 - Sun, Sep 20
American Airlines Logo
2:22 pm - 12:51 pm
ONT
-
STT
19h 29m
3 stops
American Airlines Logo
1:41 pm - 9:29 am
STT
-
ONT
22h 48m
2 stops
$710American Airlines
Thu, Aug 13 - Tue, Aug 25
American Airlines Logo
4:07 pm - 12:53 pm
ONT
-
STT
17h 46m
2 stops
American Airlines Logo
1:49 pm - 9:34 am
STT
-
ONT
22h 45m
2 stops
$729American Airlines
Wed, Aug 12 - Tue, Aug 25
American Airlines Logo
2:27 pm - 3:52 pm
ONT
-
STT
22h 25m
2 stops
American Airlines Logo
1:49 pm - 11:43 am
STT
-
ONT
24h 54m
2 stops
$734American Airlines
Sat, Jul 18 - Wed, Jul 22
American Airlines Logo
10:10 pm - 11:03 am
ONT
-
STT
9h 53m
1 stop
American Airlines Logo
4:50 pm - 12:02 pm
STT
-
ONT
22h 12m
2 stops
$747American Airlines
Thu, Aug 13 - Wed, Aug 26
American Airlines Logo
12:59 pm - 3:52 pm
ONT
-
STT
23h 53m
2 stops
American Airlines Logo
1:49 pm - 11:43 am
STT
-
ONT
24h 54m
2 stops
$761American Airlines
Wed, Aug 12 - Wed, Aug 26
American Airlines Logo
12:33 pm - 3:52 pm
ONT
-
STT
24h 19m
2 stops
American Airlines Logo
1:49 pm - 11:43 am
STT
-
ONT
24h 54m
2 stops
$766American 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 5 days.

In the past 5 days, the cheapest round-trip tickets from Ontario to Saint Thomas Island were found on American Airlines ($655) and Delta ($872).

Find deals

Good to know

Cheapest flight$292
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 5 days, the lowest price for a flight from Ontario to Saint Thomas Island was $292 for a one-way ticket and $655 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 11782 reviews
7.5Boarding
7.2Comfort
6.4Food
7.9Crew
6.8Entertainment
Airline reviews

My luggage never made it, I booked business class only to find out I’m sitting in the back. Very disappointed with the reservation

2.0 MediocreAnonymous, Jul 2026
LAX - PHL
Read more American Airlines reviews

My luggage never made it, I booked business class only to find out I’m sitting in the back. Very disappointed with the reservation

The plane was spartan, the seats not that comfortable. It was like flying a super low budget airline. They charged for coffee!!! I have never, ever experienced that before.

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

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

The flight was on time and arrived early. The crew were friendly and helpful.

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

VERY disappointed at the agent checking in my luggage. I know that the weight limit is 23 kg, a little over 50 pounds (50.71 pounds). Yet the agent kept repeating "50 pounds". So I said, the limit is 23 kg, and she had the audacity to say 'no, it is 22 kg!" Imagine my surprise. Was she ignorant or was she poorly trained? Not sure. The boarding process was pretty good. The speakers were loud enough so I still could hear them despite inconsiderate passengers continuing to speak while the announcements were going on. During the flight, the teenage girl sitting behind me kept pressing her feet to the back of my chair. I turned around several times, yet she did not get the hint. I did not make a fuss since I sense I had a bad streak that night with AA, so I just did the best I can to lean forward and not let that bother me.

Flight delayed 3 times due to maintenance (on exact same plane that had just brought us from Boston to Miami). Eventually changed to a different plane and gate.

It was wonderful upgrading to first. Plane was so cold thou. Crew was great. Wish there was a food option in first for such a long flight. Doesnt matter the time of day. Chintzy.

Both flights were delayed. One by an hour and the other by 1 1/2 hours after boarding.

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)