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Delaware

$76+ Cheap flights from Ontario (ONT) to Delaware

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ILG
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
1 adult, Economy
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Cheap flight deals from Ontario to Delaware

Cheapest flights from Ontario to Delaware
Explore the most affordable flight options available from Ontario to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/66:20 am
ONT
-
PHL
1 stop20h 11m
Frontier
Tue 4/288:36 pm
PHL
-
ONT
1 stop30h 19m
Frontier
Deal found 3/6$181
This Trip.com deal was found by Cheapflights users on 3/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2012:59 am
ONT
-
PHL
1 stop25h 35m
Frontier
Wed 4/298:31 pm
PHL
-
ONT
1 stop30h 24m
Frontier
Deal found 3/10$188
This Trip.com deal was found by Cheapflights users on 3/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/412:59 am
ONT
-
PHL
1 stop25h 35m
Frontier
Fri 5/83:41 pm
PHL
-
ONT
1 stop10h 43m
Frontier
Deal found 3/5$190
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1412:59 am
ONT
-
PHL
1 stop25h 35m
Frontier
Mon 4/208:41 pm
PHL
-
ONT
1 stop30h 14m
Frontier
Deal found 3/5$191
This Trip.com deal was found by Cheapflights users on 3/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1312:59 am
ONT
-
PHL
1 stop25h 35m
Frontier
Fri 4/178:36 pm
PHL
-
ONT
1 stop30h 19m
Frontier
Deal found 3/5$196
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1312:59 am
ONT
-
PHL
1 stop25h 35m
Frontier
Wed 4/158:41 pm
PHL
-
ONT
1 stop13h 50m
Frontier
Deal found 3/9$197
This Trip.com deal was found by Cheapflights users on 3/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1412:59 am
ONT
-
PHL
1 stop25h 35m
Frontier
Sat 4/188:41 pm
PHL
-
ONT
1 stop13h 45m
Frontier
Deal found 3/7$198
This Frontier deal was found by Cheapflights users on 3/5. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/165:33 pm
ONT
-
PHL
1 stop9h 01m
Frontier
Tue 4/218:00 am
PHL
-
ONT
1 stop13h 49m
Frontier
Deal found 3/5$200
This Frontier deal was found by Cheapflights users on 3/5. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1711:44 am
ONT
-
PHL
1 stop14h 29m
Frontier
Sat 4/258:41 pm
PHL
-
ONT
1 stop13h 45m
Frontier
Deal found 3/5$201
This Trip.com deal was found by Cheapflights users on 3/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2712:59 am
ONT
-
PHL
1 stop25h 35m
Frontier
Sat 5/98:25 pm
PHL
-
ONT
1 stop14h 06m
Frontier
Deal found 3/10$202
This Booking.com deal was found by Cheapflights users on 3/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1412:59 am
ONT
-
PHL
1 stop25h 35m
Frontier
Sun 4/193:27 pm
PHL
-
ONT
1 stop11h 29m
Frontier
Deal found 3/6$207
This Trip.com deal was found by Cheapflights users on 3/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2512:59 am
ONT
-
PHL
1 stop25h 35m
Frontier
Wed 4/298:31 pm
PHL
-
ONT
1 stop14h 00m
Frontier
Deal found 3/5$208

Find flight deals from Ontario to Delaware

Keep the following information in mind while searching for Ontario to Delaware flight deals. Data was last updated March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$181
(Kiwi.com)

One-way from

$76
(Trip.com)

Popular in

October

Cheapest in

May

Average price

$456
Provider with most accurate pricing for Ontario-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Philadelphia flights.
Search Deals
From Ontario to Delaware
Search Deals
One-way flight from Ontario to Delaware
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Delaware that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 10, 2026.
Use the filters below to find and compare flights from Ontario to Delaware that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sat 4/18

10:15 pm-9:25 am

1 stop8h 10m

Philadelphia

Sat 4/25

6:05 pm-10:43 pm

1 stop7h 38m

$357

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 4/29

3:26 pm-6:02 am

1 stop11h 36m

Philadelphia

Sat 5/2

7:22 am-2:32 pm

1 stop10h 10m

$362

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 5/13

4:03 pm-5:35 am

1 stop10h 32m

Philadelphia

Sun 8/23

5:15 pm-11:59 pm

1 stop9h 44m

$397

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 4/1

5:09 pm-5:41 am

1 stop9h 32m

Philadelphia

Mon 4/13

5:30 am-11:36 am

1 stop9h 06m

$418

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 8/28

5:15 am-5:55 pm

2 stops9h 40m

Philadelphia

Sat 9/5

3:45 pm-8:10 pm

1 stop7h 25m

$462

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sun 5/24

7:10 am-5:55 pm

1 stop7h 45m

Philadelphia

Sat 5/30

5:35 am-12:15 pm

2 stops9h 40m

$462

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 7/15

6:30 am-6:40 pm

2 stops9h 10m

Philadelphia

Tue 7/21

12:55 pm-7:00 pm

2 stops9h 05m

$467

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Mon 6/15

6:30 pm-9:45 am

2 stops12h 15m

Philadelphia

Thu 7/2

11:38 am-8:42 pm

2 stops12h 04m

$468

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sun 8/30

7:13 pm-9:43 am

2 stops11h 30m

Philadelphia

Sun 9/6

10:28 am-6:11 pm

2 stops10h 43m

$468

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Mon 8/24

4:00 pm-5:27 am

1 stop10h 27m

Philadelphia

Thu 9/24

6:45 am-2:47 pm

1 stop11h 02m

$487

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/5

Showing 1-10 of 21 resultsSorted by cheapest first
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Best time to book a flight from Ontario to Delaware

Have a flexible travel schedule? Discover the best time to fly to Delaware from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Delaware
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Delaware. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Delaware?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Delaware from Ontario.

  • How long is the flight from Ontario to Delaware?

    For as low as $357, Delta can have you in Delaware from Ontario in 8h 10m. The distance between Ontario and Delaware is about 2349 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Ontario to Delaware that include hotel bookings?

    Yes. In addition to deals on Ontario to Delaware flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Delaware?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Delaware.

  • Can I find deals for business class flights from Ontario to Delaware?

    Yes. Cheapflights offers flight deals from Ontario to Delaware by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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