Find cheap United Airlines flights to Ontario
WAS — ONT
Nov 8 — Nov 151
Round-trip
1 adult, Economy
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Cheapest United Airlines flights from USA to OntarioExplore the most affordable United Airlines flight options available from USA to Ontario. Find the lowest fares with prices last updated on October 9, 2026.
Explore the most affordable United Airlines flight options available from USA to Ontario. Find the lowest fares with prices last updated on October 9, 2026.
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/69:20 pm -
Nonstop1h 28m
Fri 11/131:35 pm -
Nonstop1h 30m
Deal found 10/9![United Airlines logo]()
$117
This United Airlines deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/36:50 pm -
Nonstop1h 25m
Wed 11/41:35 pm -
Nonstop1h 30m
Deal found 10/4![United Airlines logo]()
$119
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/69:20 pm -
Nonstop1h 28m
Sun 11/86:00 am -
Nonstop1h 30m
Deal found 10/8![United Airlines logo]()
$138
Best United Airlines flights from USA to OntarioDiscover carefully curated United Airlines flight deals from USA to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 9, 2026.
Discover carefully curated United Airlines flight deals from USA to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 9, 2026.
This United Airlines deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/36:50 pm -
Nonstop1h 25m
Wed 11/41:35 pm -
Nonstop1h 30m
Deal found 10/4![United Airlines logo]()
$119
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/134:10 pm -
Nonstop1h 25m
Sat 1/236:00 am -
Nonstop1h 33m
Deal found 10/9![United Airlines logo]()
$207
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/194:38 pm -
Nonstop1h 25m
Sat 1/3011:20 am -
Nonstop1h 33m
Deal found 10/9![United Airlines logo]()
$207
Direct United Airlines flights from USA to OntarioExplore non-stop United Airlines flight options from USA to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated October 9, 2026.
Explore non-stop United Airlines flight options from USA to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated October 9, 2026.
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/69:20 pm -
Nonstop1h 28m
Fri 11/131:35 pm -
Nonstop1h 30m
Deal found 10/9![United Airlines logo]()
$117
This United Airlines deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/36:50 pm -
Nonstop1h 25m
Wed 11/41:35 pm -
Nonstop1h 30m
Deal found 10/4![United Airlines logo]()
$119
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/69:20 pm -
Nonstop1h 28m
Sun 11/86:00 am -
Nonstop1h 30m
Deal found 10/8![United Airlines logo]()
$138
Last-minute United Airlines flights from USA to OntarioDiscover last-minute United Airlines flight deals from USA to Ontario. Data last updated October 9, 2026 and is based on user searches.
Discover last-minute United Airlines flight deals from USA to Ontario. Data last updated October 9, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/69:20 pm -
Nonstop1h 28m
Fri 11/131:35 pm -
Nonstop1h 30m
Deal found 10/9![United Airlines logo]()
$117
This United Airlines deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/36:50 pm -
Nonstop1h 25m
Wed 11/41:35 pm -
Nonstop1h 30m
Deal found 10/4![United Airlines logo]()
$119
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/69:20 pm -
Nonstop1h 28m
Sun 11/86:00 am -
Nonstop1h 30m
Deal found 10/8![United Airlines logo]()
$138
One-way United Airlines flights to OntarioSearch for one-way United Airlines flight options to Ontario. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.
Search for one-way United Airlines flight options to Ontario. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.
This United Airlines deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:50 pm -
Nonstop1h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/9![United Airlines logo]()
$59
This United Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/144:35 pm -
Nonstop1h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![United Airlines logo]()
$79
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1711:15 am -
Nonstop2h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![United Airlines logo]()
$79
Flights to Ontario with United Airlines at a glance
Find detailed information about United Airlines flights from USA to Ontario. Explore the options provided by United Airlines to plan your journey from USA to Ontario. Data last updated October 9, 2026.
Cheapflights Insights
Find cheap United Airlines flights to Ontario
US0-ONT
SFO-ONT
DEN-ONT
How long is the flight to Ontario with United Airlines?
On average, United Airlines flights from the United States to Ontario take 4 hours 20 minutes. Flights to Ontario from other popular cities in the United States will vary in length. Below are a few examples of popular routes and their flight times.
United Airlines weekly flight availability to Ontario
The most flights to Ontario operated by United Airlines are scheduled on a Sunday (10 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (7 on average).
When is the best time to book a flight to Ontario with United Airlines?
The best time to book a flight to Ontario with United Airlines is 74 days before departure. On average, fares are higher if you book 86 days before departure.
When is the cheapest time to fly to Ontario with United Airlines?
Users looking for the cheapest United Airlines fares to Ontario should consider flying on Sunday at noon, when prices are typically cheapest. Budget-minded travellers will want to avoid Monday evenings, when prices are usually at their highest.
FAQs about flights to Ontario with United Airlines
Reviews of United Airlines
See what Cheapflights users have to say about their United Airlines experience.
Overview
Reviews
United Airlines
10,000 reviews
Overview
Boarding
7.7
Crew
8.1
Food
6.7
Comfort
7.3
Entertainment
7.1
Recent reviews
10.0
|Oct 2026Is good
10.0
|Sep 2026Everything was good
8.0
|Sep 2026The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.
10.0
|Aug 2026Staff friendly, good boarding experience
4.0
|Aug 2026Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!
1 out of 3334
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