How long is the flight from Ontario to Delaware?

For as low as $319, Frontier can have you in Delaware from Ontario in 7h 03m. 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.

In terms of precipitation, rainfall in Delaware ranges from 2.9 - 4.3 inches per month. July is typically the wettest month, when rainfall can reach 4.3 in. February is typically the driest time to visit Delaware when rainfall is around 2.9 in.

If weather is an important factor for your trip to Delaware, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

What is the cheapest time of day to fly from ONT to DE?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Delaware as you normally would.

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.

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.

$91+ Flights from Ontario to Delaware

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Ontario to Delaware with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 23, 2025.

Wed 12/246:00 amONT - PHL

1 stop20h 40mFrontier

Sat 1/37:10 amPHL - ONT

1 stop19h 11mFrontier

Deal found 12/20

$235

Wed 12/246:00 pmONT - PHL

1 stop8h 40mFrontier

Mon 1/57:10 amPHL - ONT

1 stop13h 05mFrontier

Deal found 12/21

$254

Thu 12/256:45 amONT - PHL

1 stop19h 46mFrontier

Fri 1/27:10 amPHL - ONT

1 stop17h 07mFrontier

Deal found 12/21

$259

Wed 12/316:00 amONT - PHL

1 stop20h 40mFrontier

Sun 1/48:36 pmPHL - ONT

1 stop30h 23mFrontier

Deal found 12/21

$267

Sun 12/286:37 pmONT - PHL

1 stop8h 03mFrontier

Mon 1/58:36 pmPHL - ONT

1 stop28h 36mFrontier

Deal found 12/21

$278

Wed 12/246:00 amONT - PHL

1 stop20h 40mFrontier

Fri 1/27:10 amPHL - ONT

1 stop17h 07mFrontier

Deal found 12/20

$289

Thu 12/256:00 amONT - PHL

1 stop20h 40mFrontier

Thu 1/18:36 pmPHL - ONT

1 stop30h 23mFrontier

Deal found 12/20

$304

Tue 12/238:19 amONT - PHL

1 stop14h 05mFrontier

Mon 1/58:36 pmPHL - ONT

1 stop28h 36mFrontier

Deal found 12/20

$313

Thu 12/256:00 amONT - PHL

1 stop20h 40mFrontier

Sun 1/47:10 amPHL - ONT

1 stop17h 17mFrontier

Deal found 12/22

$318

Wed 12/246:00 pmONT - PHL

1 stop8h 40mFrontier

Thu 1/17:10 amPHL - ONT

1 stop13h 12mFrontier

Deal found 12/22

$324

Best flights from Ontario to Delaware
Discover carefully curated flight deals from Ontario to Delaware that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 23, 2025.

Thu 2/266:05 amONT - PHL

1 stop7h 32mFrontier

Mon 3/25:47 pmPHL - ONT

1 stop9h 12mFrontier

Deal found 12/21

$182

Sat 1/171:11 pmONT - PHL

1 stop7h 03mDelta

Sat 1/245:40 amPHL - ONT

1 stop8h 51mDelta

Deal found 12/22

$319

Tue 1/201:24 pmONT - PHL

1 stop7h 06mUnited Airlines

Tue 1/278:09 amPHL - ONT

1 stop7h 38mUnited Airlines

Deal found 12/22

$319

Wed 1/213:07 pmONT - PHL

2 stops17h 11mFrontier

Wed 1/287:04 pmPHL - ONT

2 stops44h 39mFrontier

Deal found 12/22

$249

Wed 1/76:22 amONT - SBY

2 stops11h 42mAmerican Airlines

Sun 1/116:00 amSBY - ONT

2 stops9h 38mAmerican Airlines

Deal found 12/22

$630

Sat 1/171:11 pmONT - PHL

1 stop7h 03mDelta

Tue 1/272:30 pmPHL - ONT

1 stop9h 35mDelta

Deal found 12/21

$319

Sun 1/181:11 pmONT - PHL

1 stop7h 42mDelta

Tue 1/277:00 amPHL - ONT

1 stop8h 16mDelta

Deal found 12/21

$319

Sun 1/181:11 pmONT - PHL

1 stop7h 42mDelta

Sat 1/245:40 amPHL - ONT

1 stop8h 51mDelta

Deal found 12/22

$319

Tue 1/2010:30 pmONT - PHL

1 stop9h 41mDelta

Sat 1/245:40 amPHL - ONT

1 stop8h 51mDelta

Deal found 12/21

$319

Tue 1/2012:41 pmONT - PHL

1 stop8h 40mDelta

Thu 1/225:40 amPHL - ONT

1 stop8h 51mDelta

Deal found 12/21

$319

Sun 1/1812:41 pmONT - PHL

1 stop8h 40mDelta

Wed 1/285:40 amPHL - ONT

1 stop8h 51mDelta

Deal found 12/21

$319

Tue 1/201:11 pmONT - PHL

1 stop7h 42mDelta

Mon 1/266:37 pmPHL - ONT

1 stop8h 21mDelta

Deal found 12/22

$319

Last-minute flights from Ontario to Delaware
Discover last-minute flight deals from Ontario to Delaware. Data last updated December 23, 2025 and is based on user searches.

Wed 12/246:00 amONT - PHL

1 stop20h 40mFrontier

Sat 1/37:10 amPHL - ONT

1 stop19h 11mFrontier

Deal found 12/20

$235

Wed 12/246:00 pmONT - PHL

1 stop8h 40mFrontier

Mon 1/57:10 amPHL - ONT

1 stop13h 05mFrontier

Deal found 12/21

$254

Thu 12/256:45 amONT - PHL

1 stop19h 46mFrontier

Fri 1/27:10 amPHL - ONT

1 stop17h 07mFrontier

Deal found 12/21

$259

Wed 12/316:00 amONT - PHL

1 stop20h 40mFrontier

Sun 1/48:36 pmPHL - ONT

1 stop30h 23mFrontier

Deal found 12/21

$267

Thu 1/16:45 amONT - PHL

1 stop19h 46mFrontier

Mon 1/58:36 pmPHL - ONT

1 stop28h 36mFrontier

Deal found 12/22

$234

Mon 1/56:00 pmONT - PHL

1 stop8h 40mFrontier

Mon 1/121:05 pmPHL - ONT

1 stop13h 51mFrontier

Deal found 12/22

$233

Thu 1/88:31 amONT - PHL

1 stop12h 57mFrontier

Mon 1/121:05 pmPHL - ONT

1 stop13h 51mFrontier

Deal found 12/21

$182

Thu 1/88:31 amONT - PHL

1 stop12h 57mFrontier

Sun 1/188:53 amPHL - ONT

1 stop13h 08mFrontier

Deal found 12/22

$217

Thu 1/88:31 amONT - PHL

1 stop12h 57mFrontier

Mon 1/195:42 pmPHL - ONT

1 stop9h 17mFrontier

Deal found 12/22

$251

Fri 1/98:31 amONT - PHL

1 stop12h 57mFrontier

Sun 1/188:53 amPHL - ONT

1 stop13h 08mFrontier

Deal found 12/22

$252

Mon 1/128:31 amONT - PHL

1 stop12h 57mFrontier

Thu 1/154:14 pmPHL - ONT

1 stop24h 54mFrontier

Deal found 12/22

$183

Wed 1/213:07 pmONT - PHL

2 stops17h 11mFrontier

Wed 1/287:04 pmPHL - ONT

2 stops44h 39mFrontier

Deal found 12/22

$249

One-way flights from Ontario to Delaware
Search for one-way flight options from Ontario to Delaware. Find affordable one-way fares based on user searches. Data last updated December 23, 2025.

Thu 2/126:05 amONT - PHL

1 stop7h 32mFrontier

Deal found 12/21

$91

Thu 2/266:05 amONT - PHL

1 stop7h 32mFrontier

Deal found 12/21

$92

Thu 1/88:31 amONT - PHL

1 stop12h 57mFrontier

Deal found 12/22

$97

Wed 12/316:00 amONT - PHL

1 stop20h 40mFrontier

Deal found 12/22

$98

Tue 1/207:15 amONT - PHL

2 stops38h 37mFrontier

Deal found 12/20

$100

Tue 1/64:04 pmONT - PHL

2 stops37h 33mFrontier

Deal found 12/21

$106

Sat 1/179:10 pmONT - PHL

2 stops46h 25mFrontier

Deal found 12/22

$115

Wed 1/217:15 amONT - PHL

2 stops24h 34mFrontier

Deal found 12/20

$117

Wed 1/217:15 amONT - PHL

3 stops22h 32mMultiple Airlines

Deal found 12/20

$118

Wed 2/258:40 amONT - PHL

1 stop28h 57mFrontier

Deal found 12/21

$119

Thu 1/157:56 pmONT - PHL

2 stops33h 51mMultiple Airlines

Deal found 12/20

$121

Mon 1/1910:18 pmONT - PHL

3 stops33h 56mMultiple Airlines

Deal found 12/20

$124

Find flight deals from Ontario to Delaware

Most accurate provider	Mytrip 3 stars
Most trusted provider	Mytrip 3 stars
Round-trip from	$182 (Frontier)
One-way from	$91 (Frontier)
Popular in	December
Cheapest in	August
Average price	$558

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. 20% potential increase in price ($100 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 2/26

6:05 am-4:37 pm

1 stop7h 32m

Philadelphia

Mon 3/2

5:47 pm-11:59 pm

1 stop9h 12m

$182

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 1/21

3:07 pm-11:18 am

2 stops17h 11m

Philadelphia

Wed 1/28

7:04 pm-12:43 pm

2 stops44h 39m

$249

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sat 1/17

1:11 pm-11:14 pm

1 stop7h 03m

Philadelphia

Sat 1/24

5:40 am-11:31 am

1 stop8h 51m

$319

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 1/20

1:24 pm-11:30 pm

1 stop7h 06m

Philadelphia

Tue 1/27

8:09 am-12:47 pm

1 stop7h 38m

$319

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sat 1/17

1:11 pm-11:14 pm

1 stop7h 03m

Philadelphia

Tue 1/27

2:30 pm-9:05 pm

1 stop9h 35m

$319

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sun 1/18

1:11 pm-11:53 pm

1 stop7h 42m

Philadelphia

Tue 1/27

7:00 am-12:16 pm

1 stop8h 16m

$319

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sun 1/18

1:11 pm-11:53 pm

1 stop7h 42m

Philadelphia

Sat 1/24

5:40 am-11:31 am

1 stop8h 51m

$319

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 1/20

10:30 pm-11:11 am

1 stop9h 41m

Philadelphia

Sat 1/24

5:40 am-11:31 am

1 stop8h 51m

$319

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 1/20

12:41 pm-12:21 am

1 stop8h 40m

Philadelphia

Thu 1/22

5:40 am-11:31 am

1 stop8h 51m

$319

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sun 1/18

12:41 pm-12:21 am

1 stop8h 40m

Philadelphia

Wed 1/28

5:40 am-11:31 am

1 stop8h 51m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/22

Showing 1-10 of 24 results

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

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 $319, Frontier can have you in Delaware from Ontario in 7h 03m. 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Ontario to Delaware

Los Angeles to John F Kennedy Intl flights

San Francisco to Las Vegas flights

San Francisco to John F Kennedy Intl flights

Los Angeles to Newark flights

Los Angeles to Seattle flights

Los Angeles to Honolulu flights

Los Angeles to LaGuardia flights

San Francisco to Honolulu flights

Los Angeles to Miami flights

Los Angeles to Dallas/Fort Worth flights

San Francisco to Newark flights

Los Angeles to Las Vegas flights

Los Angeles to Orlando flights

Los Angeles to O'Hare Intl flights

Los Angeles to Fort Lauderdale flights

Burbank to Las Vegas flights

Ontario to San Francisco flights

Los Angeles to San Francisco flights

Santa Ana to Las Vegas flights

San Francisco to Los Angeles flights

San Jose to Las Vegas flights

San Francisco to Dallas/Fort Worth flights

San Francisco to LaGuardia flights

San Francisco to Miami flights

Los Angeles to Denver flights

San Francisco to Seattle flights

San Francisco to Ontario flights

Oakland to Las Vegas flights

Los Angeles to Salt Lake City flights

San Francisco to Kahului flights

Los Angeles to Kahului flights

San Diego to John F Kennedy Intl flights

Los Angeles to Hobby flights

San Francisco to San Diego flights

Los Angeles to Reagan-National flights

Ontario to John F Kennedy Intl flights

Ontario to Seattle flights

San Francisco to Orlando flights

San Francisco to Denver flights

Santa Ana to Dallas/Fort Worth flights

San Francisco to Santa Ana flights

Los Angeles to Atlanta flights

Los Angeles to Austin flights

Ontario to Dallas/Fort Worth flights

San Francisco to O'Hare Intl flights

Los Angeles to San Jose flights

Burbank to LaGuardia flights

Los Angeles to New Orleans flights

Los Angeles to Kailua-Kona flights

Los Angeles to Dulles Intl flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$91+ 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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Delaware with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Ontario to Delaware

Cheapest flights from Ontario to DelawareExplore 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 23, 2025.

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 23, 2025.

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 23, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Delaware

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?

How long is the flight from Ontario to Delaware?

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

How can I find direct flights from Ontario to Delaware?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Delaware

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

100% Free

Book with Flexibility

Travel Smart

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 23, 2025.