Trip.com
>
Cheap Flights
>
United States
>
California
>
Ontario
Hotels in Ontario
>
Flights from Watertown to Ontario

Flight deals from Watertown to Ontario

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • Round-trip
  • One way

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Flight Information from Watertown to Ontario

Cheapest one-way flight price US$250
Off-season travel month November
Flight distance 2,123.39km
Popular airline Denver Air Connection

Find the best time to fly from Watertown to Ontario

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights
From price
Search
  • 8 15
  • 15 22
  • 22 29

  • Jul

    29 6
  • 6 13
  • 13 20
  • 20 27

  • Aug

    27 3
  • 3 10
  • 10 17
  • 17 24
  • 24 31
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

FAQ

  • When are flight tickets from Watertown (ATY) to Ontario (ONT) the cheapest?

    Airlines adjust prices for flights from Watertown to Ontario based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much are flights from Watertown (ATY) to Ontario (ONT) cost?

    According to Trip.com's data, the lowest price is around US$528.

How to find a cheap flight from Watertown to Ontario

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Watertown to Ontario. Book your flights at the right time and save more.
1
Be flexible with your travel dates to get the cheapest flight from Watertown to Ontario.
Simply tap "Date" on the flight search bar to browse through the calendar and check out airfare from Watertown to Ontario over the next 6 months in 2025. If you're planning to fly within the next three months, it looks like the most affordable option is on Mon, Jun 16, with one-way flights priced at just US$251.
2
Compare cheap flight deals from Watertown to Ontario across hundreds of airlines.
With our extensive search, you can compare prices from over 500 airlines to find the cheapest flight tickets from Watertown to Ontario. The cheapest airline for this route is Denver Air Connection.
3
Set up a Price Alert
By setting up a Price Alert for your journey from Watertown to Ontario, you can easily keep an eye on ticket prices without having to check every day.
4
Don't miss out on cheap flight deals and promo codes from Watertown to Ontario.
You can always find the latest offers through Trip.com Deals and Promo Codes for cheap flights. By signing up for a free membership, you'll get access to even more deals for your flights.
5
Book early or wait until the last minute.
It's usually best to book early. Flight tickets are often cheapest when they're first released, typically about a year before the departure date. So, have a look online as soon as the flights you're interested in become available. If you miss the cheapest time, you might still find some good deals as the departure date gets closer.
6
Search for flights on the go.
For the best travel flight booking experience, download the Trip.com app. You can search for cheap flights from Watertown to Ontario and snag some exclusive deals just for you.

More Travel Options

  • Top Routes from Watertown
  • Top Routes to Ontario
  • Popular Airlines