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Delaware

$85+ 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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ILG
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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Cheap flight deals from Ontario to Delaware

Keep the following information in mind while searching for Ontario to Delaware flight deals. Data was last updated October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$180
(CheapOair)

One-way from

$85
(Trip.com)

Popular in

March

Cheapest in

August

Average price

$363
Provider with most accurate pricing for Los Angeles-Philadelphia flight deals.
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From Ontario to Delaware
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One-way flight from Ontario to Delaware
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Highest demand for flights based on searches. 12% potential increase in price ($51 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 16, 2025.

This CheapOair deal was found by Cheapflights users on 10/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/128:45 amONT - PHL
1 stop17h 04mFrontier
Sat 11/156:19 amPHL - ONT
1 stop7h 51mFrontier
Deal found 10/15$180
This Trip.com deal was found by Cheapflights users on 10/14. 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.
Thu 12/44:02 pmONT - PHL
1 stop9h 45mFrontier
Mon 12/86:00 amPHL - ONT
1 stop7h 57mFrontier
Deal found 10/14$189
This Frontier deal was found by Cheapflights users on 10/16. 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 11/1312:05 pmONT - PHL
1 stop13h 44mFrontier
Mon 11/176:19 amPHL - ONT
1 stop7h 51mFrontier
Deal found 10/16$210
This CheapOair deal was found by Cheapflights users on 10/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:53 amONT - PHL
1 stop18h 56mFrontier
Sat 11/156:19 amPHL - ONT
1 stop7h 51mFrontier
Deal found 10/15$211
This Mytrip deal was found by Cheapflights users on 10/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/66:53 amONT - PHL
1 stop18h 56mFrontier
Sun 11/910:48 pmPHL - ONT
1 stop11h 41mFrontier
Deal found 10/15$234
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Wed 12/106:15 amONT - PHL
2 stops39h 19mFrontier
Mon 12/156:15 amPHL - ONT
1 stop13h 08mFrontier
Deal found 10/15$241
This CheapOair deal was found by Cheapflights users on 10/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/144:05 pmONT - PHL
1 stop9h 44mFrontier
Mon 11/176:19 amPHL - ONT
1 stop7h 51mFrontier
Deal found 10/14$242
This CheapOair deal was found by Cheapflights users on 10/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/236:53 amONT - PHL
1 stop19h 26mFrontier
Thu 10/306:19 amPHL - ONT
1 stop7h 51mFrontier
Deal found 10/16$256
This CheapOair deal was found by Cheapflights users on 10/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/511:52 amONT - PHL
1 stop13h 55mFrontier
Mon 12/86:00 amPHL - ONT
1 stop7h 57mFrontier
Deal found 10/13$258
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Fri 11/77:23 pmONT - PHL
1 stop18h 03mFrontier
Tue 11/116:50 pmPHL - ONT
2 stops38h 37mFrontier
Deal found 10/15$259
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Thu 12/412:04 pmONT - PHL
2 stops23h 35mFrontier
Sun 12/78:36 pmPHL - ONT
1 stop20h 49mFrontier
Deal found 10/15$261

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 October 16, 2025.
Use the filters below to find and compare flights from Ontario to Delaware that are best for you.

Fly from

Ontario

Fly to

Delaware

Route

Depart

Return

Price

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 11/13

12:16 pm-10:50 pm

1 stop7h 34m

Philadelphia

Tue 11/18

4:58 pm-11:04 pm

1 stop9h 06m

$327

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 11/12

6:00 am-6:12 pm

1 stop9h 12m

Philadelphia

Sat 11/15

7:02 am-3:17 pm

1 stop11h 15m

$336

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sat 11/8

4:11 pm-5:42 am

1 stop10h 31m

Philadelphia

Wed 11/12

7:02 am-3:17 pm

1 stop11h 15m

$336

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Mon 11/17

6:00 am-5:37 pm

1 stop8h 37m

Philadelphia

Thu 12/4

7:05 am-12:21 pm

1 stop8h 16m

$337

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 11/18

10:25 pm-9:20 am

1 stop7h 55m

Philadelphia

Thu 12/4

6:50 pm-11:58 pm

1 stop8h 08m

$337

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Mon 11/10

10:25 pm-9:20 am

1 stop7h 55m

Philadelphia

Wed 11/12

4:58 pm-11:04 pm

1 stop9h 06m

$337

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 11/19

7:05 am-4:56 pm

1 stop6h 51m

Philadelphia

Wed 12/3

7:05 am-12:21 pm

1 stop8h 16m

$337

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 12/10

6:00 am-7:39 pm

2 stops10h 39m

Philadelphia

Mon 12/15

7:05 am-12:21 pm

1 stop8h 16m

$342

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 12/24

1:15 pm-11:18 pm

1 stop7h 03m

Philadelphia

Tue 1/6

10:21 am-10:38 pm

2 stops15h 17m

$347

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 12/10

5:45 am-5:15 pm

2 stops8h 30m

Philadelphia

Mon 12/15

4:00 pm-10:05 pm

2 stops9h 05m

$354

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/14

Showing 1-10 of 21 results
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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 $327, Delta can have you in Delaware from Ontario in 7h 34m. 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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Alternative routes for Ontario to Delaware

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