App
Customer Support
EUR
Find Bookings
Trip.com
>
Flights
>
Flights to United States
>
United Airlines
>
United Airlines Flights to Ontario (ONT)
Worldwide Coverage
Worldwide Coverage
Flights to over 5,000 cities
One-stop Service Guarantee
One-stop Service Guarantee
Price guaranteed upon confirmed payment, booking guaranteed once tickets issued
Secure Payment
Secure Payment
Convenient & reliable booking and payment system
UA

United Airlines Flights to Ontario

  • One way
  • Round-trip
      • Cheapest nonstop
        SFO21:25
        1h 30m
        Nonstop
        ONT22:55
        United Airlines|San Francisco - Ontario|Mon, Apr 28
        €41€114
        64% OFF
        64% OFF
        €114€41

        Choose United Airlines flights from San Francisco to Ontario. The one-way direct flight with United Airlines departs from San Francisco International Airport on Mon, Apr 28, arriving at Ontario International Airport. One-way Prices start from €41 including taxes and charges.

      • DEN19:25
        2h 27m
        Nonstop
        ONT20:52
        United Airlines|Denver - Ontario|Tue, Mar 4
        €88€114
        23% OFF
        23% OFF
        €114€88

        Choose United Airlines flights from Denver to Ontario. The one-way direct flight with United Airlines departs from Denver International Airport on Tue, Mar 4, arriving at Ontario International Airport. One-way Prices start from €88 including taxes and charges.

      • BUR07:00
        26h 34m
        1 stop
        ONT09:34
        United Airlines|Burbank - Ontario|Wed, Feb 26
        €73€114
        36% OFF
        36% OFF
        €114€73

        Choose United Airlines flights from Burbank to Ontario. The one-way connecting flight with United Airlines departs from Bob Hope Airport on Wed, Feb 26, arriving at Ontario International Airport. One-way Prices start from €73 including taxes and charges.

      • SNA18:18
        15h 16m
        1 stop
        ONT09:34
        United Airlines|Santa Ana - Ontario|Wed, Feb 26
        €77
        €77

        Choose United Airlines flights from Santa Ana to Ontario. The one-way connecting flight with United Airlines departs from John Wayne Airport on Wed, Feb 26, arriving at Ontario International Airport. One-way Prices start from €77 including taxes and charges.

      • CYS06:00
        19h 9m
        1 stop
        ONT00:09
        United Airlines|Cheyenne - Ontario|Thu, Mar 13
        €90
        €90

        Choose United Airlines flights from Cheyenne to Ontario. The one-way connecting flight with United Airlines departs from Cheyenne Airport on Thu, Mar 13, arriving at Ontario International Airport. One-way Prices start from €90 including taxes and charges.

      • SMF16:21
        3h 49m
        1 stop
        ONT20:10
        United Airlines|Sacramento - Ontario|Tue, Mar 11
        €92
        €92

        Choose United Airlines flights from Sacramento to Ontario. The one-way connecting flight with United Airlines departs from Sacramento International Airport on Tue, Mar 11, arriving at Ontario International Airport. One-way Prices start from €92 including taxes and charges.

      • COS07:30
        17h 29m
        1 stop
        ONT23:59
        United Airlines|Colorado Springs - Ontario|Tue, Apr 22
        €95
        €95

        Choose United Airlines flights from Colorado Springs to Ontario. The one-way connecting flight with United Airlines departs from Colorado Springs Airport on Tue, Apr 22, arriving at Ontario International Airport. One-way Prices start from €95 including taxes and charges.

      • MEM08:06
        8h 21m
        1 stop
        ONT14:27
        United Airlines|Memphis - Ontario|Tue, Apr 1
        €96
        €96

        Choose United Airlines flights from Memphis to Ontario. The one-way connecting flight with United Airlines departs from Memphis International Airport on Tue, Apr 1, arriving at Ontario International Airport. One-way Prices start from €96 including taxes and charges.

      • PDX13:34
        7h 6m
        1 stop
        ONT20:40
        United Airlines|Portland - Ontario|Wed, Feb 19
        €97
        €97

        Choose United Airlines flights from Portland to Ontario. The one-way connecting flight with United Airlines departs from Portland International Airport on Wed, Feb 19, arriving at Ontario International Airport. One-way Prices start from €97 including taxes and charges.

      • SEA05:00
        4h 54m
        1 stop
        ONT09:54
        United Airlines|Seattle - Ontario|Sun, Mar 9
        €99
        €99

        Choose United Airlines flights from Seattle to Ontario. The one-way connecting flight with United Airlines departs from Seattle-Tacoma International Airport on Sun, Mar 9, arriving at Ontario International Airport. One-way Prices start from €99 including taxes and charges.

      • SHA01:00 pm
        3h 5m
        Nonstop
        ONT02:00 pm
        United Airlines|Shanghai - Ontario|Sun, Feb 23
        Find More Flights
        Find More Flights

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

When is the cheapest time to fly to Ontario with United Airlines?

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

There is 1 airport in Ontario. Find the most suitable United Airlines flights to Ontario.

  • 12517.03 km from downtown Ontario
    Ontario International Airport
    Tickets From
    €41

About United Airlines

Airline Name
United Airlines
Airline Code
UA
Airline Type
Full Service Carrier (FSC)
Airline Alliance
Star Alliance
Popular Countries United Airlines Flies to:
United States, Mexico and Iraq
Popular United Airlines Arrival Cities
Popular United Airlines Departure Cities
Based on Trip.com Historical Data

United Airlines Flights to Ontario - FAQ

  • Is there a baggage allowance?

    0-1 pieces of luggage are usually permitted for each economy class passenger traveling with United Airlines (UA). This information can vary depending on your flight, so be sure to check your itinerary.

  • How can I book cheaper tickets?

    You can book cheaper flights in the following ways:
    • Search for tickets to a city or airport near Ontario.
    • Look up different airlines that have flights to Ontario.
    • Browse different departure dates from the same month.
    • Filter for different departure times from the same day.
    • Check for discount information on various social media sites.
    • Explore deals and discounts on airline websites.

Contact Us

About

Other Services

Payment Methods
Our Partners
Copyright © 2025 Trip.com Travel Singapore Pte. Ltd. All rights reserved
Site Operator: Trip.com Travel Singapore Pte. Ltd.