Find cheap Delta flights to Ontario
WAS — ONT
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Cheapest Delta flights from USA to OntarioExplore the most affordable Delta flight options available from USA to Ontario. Find the lowest fares with prices last updated on September 10, 2026.
Explore the most affordable Delta flight options available from USA to Ontario. Find the lowest fares with prices last updated on September 10, 2026.
This Delta deal was found by Cheapflights users on 9/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:56 pm -
Nonstop2h 47m
Thu 10/156:20 am -
Nonstop3h 04m
Deal found 9/6![Delta logo]()
$157
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:50 pm -
Nonstop2h 50m
Mon 10/56:00 pm -
Nonstop2h 50m
Deal found 9/9![Delta logo]()
$158
This Delta deal was found by Cheapflights users on 9/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/175:30 am -
1 stop7h 06m
Wed 10/2811:56 am -
Nonstop2h 59m
Deal found 9/7![Delta logo]()
$167
Best Delta flights from USA to OntarioDiscover carefully curated Delta 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 September 10, 2026.
Discover carefully curated Delta 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 September 10, 2026.
This Delta deal was found by Cheapflights users on 9/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/158:25 am -
Nonstop2h 52m
Wed 1/67:00 am -
Nonstop3h 05m
Deal found 9/5![Delta logo]()
$157
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/77:56 pm -
Nonstop2h 47m
Wed 11/117:00 am -
Nonstop3h 01m
Deal found 9/9![Delta logo]()
$157
This Delta deal was found by Cheapflights users on 9/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:56 pm -
Nonstop2h 47m
Mon 10/266:00 pm -
Nonstop2h 59m
Deal found 9/7![Delta logo]()
$157
Direct Delta flights from USA to OntarioExplore non-stop Delta flight options from USA to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated September 10, 2026.
Explore non-stop Delta flight options from USA to Ontario based on user searches, and compare prices and availability for your desired travel dates. Data last updated September 10, 2026.
This Delta deal was found by Cheapflights users on 9/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:56 pm -
Nonstop2h 47m
Thu 10/156:20 am -
Nonstop3h 04m
Deal found 9/6![Delta logo]()
$157
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:50 pm -
Nonstop2h 50m
Mon 10/56:00 pm -
Nonstop2h 50m
Deal found 9/9![Delta logo]()
$158
This Delta deal was found by Cheapflights users on 9/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/167:55 pm -
Nonstop2h 48m
Thu 2/187:00 am -
Nonstop3h 05m
Deal found 9/7![Delta logo]()
$217
Last-minute Delta flights from USA to OntarioDiscover last-minute Delta flight deals from USA to Ontario. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute Delta flight deals from USA to Ontario. Data last updated September 10, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 9/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/107:56 pm -
Nonstop2h 47m
Thu 10/156:20 am -
Nonstop3h 04m
Deal found 9/6![Delta logo]()
$157
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:50 pm -
Nonstop2h 50m
Mon 10/56:00 pm -
Nonstop2h 50m
Deal found 9/9![Delta logo]()
$158
This Delta deal was found by Cheapflights users on 9/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/175:30 am -
1 stop7h 06m
Wed 10/2811:56 am -
Nonstop2h 59m
Deal found 9/7![Delta logo]()
$167
One-way Delta flights to OntarioSearch for one-way Delta flight options to Ontario. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
Search for one-way Delta flight options to Ontario. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/265:25 am -
1 stop4h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Delta logo]()
$99
This Delta deal was found by Cheapflights users on 9/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/77:56 pm -
Nonstop2h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Delta logo]()
$109
This Delta deal was found by Cheapflights users on 9/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/317:15 am -
1 stop5h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Delta logo]()
$119
Flights to Ontario with Delta at a glance
Find detailed information about Delta flights from USA to Ontario. Explore the options provided by Delta to plan your journey from USA to Ontario. Data last updated September 10, 2026.
Cheapflights Insights
Find cheap Delta flights to Ontario
US0-ONT
SEA-ONT
DEN-ONT
How long is the flight to Ontario with Delta?
On average, Delta flights from the United States to Ontario take 3 hours 14 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.
Delta weekly flight availability to Ontario
The most flights to Ontario operated by Delta are scheduled on a Thursday (18 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (9 on average).
When is the best time to book a flight to Ontario with Delta?
The best time to book a flight to Ontario with Delta is 59 days before departure. On average, fares are higher if you book on the same day as departure.
When is the cheapest time to fly to Ontario with Delta?
Users looking for the cheapest Delta fares to Ontario should consider flying on Saturday at noon, when prices are typically cheapest. Budget-minded travellers will want to avoid Sunday afternoons, when prices are usually at their highest.
FAQs about flights to Ontario with Delta
Reviews of Delta
See what Cheapflights users have to say about their Delta experience.
Overview
Reviews
Delta
8,554 reviews
Overview
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Crew
8.5
Food
7.2
Recent reviews
8.0
|Aug 2026Although I still enjoy flying Delta, the overall flying experience feels cheapened. But I guess that is true of most, if not all american carriers.
10.0
|Aug 2026No food and entertainment. Also de aircraft is old and noisy.
10.0
|Jul 2026Great
8.0
|Jun 2026All good with the airline
8.0
|Jun 2026Food snacks u can do better
1 out of 2852
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