ONT - STT

$341 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 9/26. 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

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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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 18 - Mon, Sep 22
American Airlines Logo
12:45 pm - 12:50 pmONT-STT
21h 05m2 stops
American Airlines Logo
5:10 pm - 11:57 amSTT-ONT
21h 47m2 stops
$595American Airlines
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Fri, Feb 6 - Wed, Feb 11
United Airlines Logo
6:42 pm - 2:30 pmONT-STT
15h 48m2 stops
United Airlines Logo
3:05 pm - 10:26 pmSTT-ONT
11h 21m1 stop
$685United Airlines
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Mon, Feb 2 - Fri, Feb 6
United Airlines Logo
6:42 pm - 12:00 pmONT-STT
13h 18m2 stops
United Airlines Logo
3:05 pm - 10:26 pmSTT-ONT
11h 21m1 stop
$712United Airlines
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Mon, Sep 8 - Mon, Sep 22
American Airlines Logo
10:35 pm - 12:50 pmONT-STT
11h 15m2 stops
American Airlines Logo
1:40 pm - 10:33 pmSTT-ONT
11h 53m2 stops
$716American Airlines
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Mon, Nov 10 - Sat, Nov 15
United Airlines Logo
6:38 pm - 12:00 pmONT-STT
13h 22m2 stops
United Airlines Logo
3:05 pm - 10:31 pmSTT-ONT
11h 26m1 stop
$802United Airlines
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Fri, Feb 6 - Wed, Feb 11
United Airlines Logo
6:02 am - 2:30 pmONT-STT
28h 28m1 stop
United Airlines Logo
3:05 pm - 10:26 pmSTT-ONT
11h 21m1 stop
$854United Airlines
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Sun, Jan 4 - Thu, Jan 8
United Airlines Logo
6:39 pm - 12:00 pmONT-STT
13h 21m2 stops
United Airlines Logo
3:05 pm - 10:26 pmSTT-ONT
11h 21m1 stop
$863United Airlines
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Fri, Sep 12 - Fri, Sep 19
Logo
6:38 pm - 1:01 pmONT-STT
15h 23m2 stops
Logo
12:54 pm - 9:25 pmSTT-ONT
11h 31m2 stops
$916
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Thu, Sep 18 - Mon, Sep 22
Delta Logo
10:00 pm - 1:33 pmONT-STT
12h 33m1 stop
Delta Logo
2:43 pm - 10:23 pmSTT-ONT
10h 40m1 stop
$929Delta
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Thu, Sep 18 - Mon, Sep 22
Delta Logo
10:00 pm - 1:33 pmONT-STT
12h 33m1 stop
Delta Logo
2:43 pm - 11:42 pmSTT-ONT
11h 59m2 stops
$1,048Delta
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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.

What’s the cheapest day of the week to fly from Ontario to Saint Thomas Island?

The average price of all round-trip flights from Ontario to Saint Thomas Island clicked on KAYAK for each day over the last 12 months.

For Ontario to Saint Thomas Island, Thursday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Saint Thomas Island back to Ontario, the best deals are generally found on Wednesday, with Thursday being the most expensive.

Find deals

Good to know

Cheapest flight$341
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 $341 for a one-way ticket and $595 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?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Ontario and Saint Thomas Island, with SkyTeam being the most commonly used for this route.

  • 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.
7.2
American AirlinesOverall score based on 10000 reviews
6.9Entertainment
7.5Boarding
8.0Crew
7.2Comfort
6.5Food
Airline reviews

4 hours late, including over +1 hour waiting in plane to take off. Baggage left behind too.

2.0 MediocreAnonymous, Aug 2025SBP - DFW
Read more American Airlines reviews

4 hours late, including over +1 hour waiting in plane to take off. Baggage left behind too.

While waiting to claim my checked luggage, I discovered the airline had lost it. After a long wait and inquiries, I discovered it was on another flight. Fortunately, the airline finally sent my luggage home.

Was not able to watch most shows on the entertainment site. They would not load

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Delayed flight, so I switched fights to SFO to Phoenix , Phoenix to DSM. Excellent service through American Airlines

AA re-routed flight from HNL to LAX due to delay. My group of 3 with reserved seats in row 9 was broken up, with one assigned to a middle seat, another in the last row of the plane. Not happy. No explanation to the delay. No apologies. No compensation. Would have been nice to be offered an Admiral Club admission or a voucher for the extra 3 hours of layover in LAX. Could not hear the boarding gate announcements in LAX. Adjacent gate was boarding at the same time. Loud speakers were competing against each other. Barely made my boarding group.

Almost a 6 hour flight and the only food option is a cheese plate… and chips. Also how is it there are no options for texting on American. I’ll be going back to delta and united.

Bad food, small seats that didn’t recline. I thought I was buying a quantas ticket so I feel like I got scammed

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!

Cramped seats. FAA should make airlines have more legroom, for even short people complain

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)

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