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Delaware

$69+ 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 1/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ILG
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
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 December 4, 2025.

This Mytrip deal was found by Cheapflights users on 12/2. 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.
Tue 12/306:17 pmONT - PHL
1 stop8h 23mFrontier
Thu 1/17:10 amPHL - ONT
1 stop13h 12mFrontier
Deal found 12/2$183
This CheapOair deal was found by Cheapflights users on 12/2. 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 12/176:15 amONT - PHL
1 stop20h 25mFrontier
Sat 1/37:10 amPHL - ONT
1 stop19h 11mFrontier
Deal found 12/2$184
This CheapOair deal was found by Cheapflights users on 12/3. 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 12/246:00 pmONT - PHL
1 stop8h 40mFrontier
Sat 1/37:10 amPHL - ONT
1 stop19h 11mFrontier
Deal found 12/3$185
This Frontier deal was found by Cheapflights users on 12/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/144:01 pmONT - PHL
1 stop10h 30mFrontier
Mon 1/121:05 pmPHL - ONT
1 stop13h 51mFrontier
Deal found 12/4$207
This Mytrip deal was found by Cheapflights users on 12/2. 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 12/256:07 pmONT - PHL
1 stop8h 33mFrontier
Thu 1/17:10 amPHL - ONT
1 stop17h 07mFrontier
Deal found 12/2$208
This CheapOair deal was found by Cheapflights users on 12/2. 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 12/186:45 amONT - PHL
1 stop19h 46mFrontier
Thu 1/17:10 amPHL - ONT
1 stop13h 12mFrontier
Deal found 12/2$209
This CheapOair deal was found by Cheapflights users on 12/3. 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.
Sun 12/218:19 amONT - PHL
1 stop14h 05mFrontier
Mon 1/58:36 pmPHL - ONT
1 stop28h 36mFrontier
Deal found 12/3$229
This CheapOair deal was found by Cheapflights users on 12/3. 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 12/123:20 pmONT - PHL
1 stop11h 11mFrontier
Sun 12/148:36 pmPHL - ONT
1 stop20h 49mFrontier
Deal found 12/3$233
This Frontier deal was found by Cheapflights users on 12/3. 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.
Mon 12/226:00 pmONT - PHL
1 stop8h 40mFrontier
Thu 1/17:10 amPHL - ONT
1 stop13h 12mFrontier
Deal found 12/3$234
This CheapOair deal was found by Cheapflights users on 12/2. 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.
Mon 12/296:45 amONT - PHL
1 stop19h 46mFrontier
Thu 1/17:10 amPHL - ONT
1 stop17h 07mFrontier
Deal found 12/2$235
This Gotogate deal was found by Cheapflights users on 12/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/206:00 amONT - PHL
1 stop20h 40mFrontier
Mon 1/58:36 pmPHL - ONT
1 stop28h 36mFrontier
Deal found 12/2$236

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 December 4, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$181
(Kiwi.com)

One-way from

$69
(WAYA)

Popular in

November

Cheapest in

August

Average price

$483
Provider with most accurate pricing for Los Angeles-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-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. 13% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 4, 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

Wed 1/7

1:11 pm-11:14 pm

1 stop7h 03m

Philadelphia

Tue 1/13

5:40 am-11:31 am

1 stop8h 51m

$257

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 2/24

1:10 pm-11:46 pm

1 stop7h 36m

Philadelphia

Mon 3/2

6:50 pm-11:49 pm

1 stop7h 59m

$257

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 2/26

1:10 pm-11:46 pm

1 stop7h 36m

Philadelphia

Tue 3/3

5:31 am-12:02 pm

1 stop9h 31m

$257

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sat 2/28

10:20 pm-11:09 am

1 stop9h 49m

Philadelphia

Mon 3/2

6:50 pm-11:49 pm

1 stop7h 59m

$257

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Mon 2/23

10:20 pm-11:06 am

1 stop9h 46m

Philadelphia

Wed 3/4

6:50 pm-11:49 pm

1 stop7h 59m

$257

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 1/8

12:41 pm-12:21 am

1 stop8h 40m

Philadelphia

Sat 1/10

6:00 am-1:56 pm

2 stops10h 56m

$262

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 12/18

6:17 pm-5:40 am

1 stop8h 23m

Philadelphia

Sun 1/18

8:53 am-7:01 pm

1 stop13h 08m

$268

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 2/24

10:20 pm-11:06 am

1 stop9h 46m

Philadelphia

Thu 3/5

7:00 am-12:07 pm

1 stop8h 07m

$289

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 2/25

10:20 pm-11:09 am

1 stop9h 49m

Philadelphia

Thu 3/5

7:00 am-12:07 pm

1 stop8h 07m

$289

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 2/27

10:20 pm-9:23 am

1 stop8h 03m

Philadelphia

Thu 3/5

7:00 am-12:07 pm

1 stop8h 07m

$305

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 20 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 $257, Delta can have you in Delaware from Ontario in 7h 03m. The distance between Ontario and Delaware is about 2349 mi.

  • 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

See prices for flight routes from nearby airports that may be better suited for you.
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