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Delaware

$65+ 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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ILG
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$130
(Frontier)

One-way from

$65
(Frontier)

Popular in

June

Cheapest in

September

Average price

$426
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. 8% potential increase in price ($37 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 February 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 February 20, 2025.

This Frontier deal was found by Cheapflights users on 2/18. 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.
Wed 3/52:43 pmONT - PHL
1 stop12h 21mFrontier
Mon 3/108:00 amPHL - ONT
1 stop10h 04mFrontier
Deal found 2/18$130
This Trip.com deal was found by Cheapflights users on 2/19. 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 3/39:06 pmONT - PHL
1 stop14h 43mMultiple Airlines
Thu 3/67:35 amPHL - ONT
1 stop10h 29mMultiple Airlines
Deal found 2/19$183
This Delta deal was found by Cheapflights users on 2/20. 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.
Wed 4/1612:10 pmONT - PHL
1 stop7h 10mDelta
Wed 4/232:48 pmPHL - ONT
2 stops11h 53mDelta
Deal found 2/20$348
This United Airlines deal was found by Cheapflights users on 2/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/25:00 amONT - PHL
2 stops9h 25mUnited Airlines
Mon 4/712:50 pmPHL - ONT
2 stops13h 05mUnited Airlines
Deal found 2/19$375
This American Airlines deal was found by Cheapflights users on 2/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/176:02 amONT - PHL
1 stop7h 01mAmerican Airlines
Sat 8/239:29 amPHL - ONT
1 stop8h 23mAmerican Airlines
Deal found 2/19$382
This Southwest deal was found by Cheapflights users on 2/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/32:50 pmONT - PHL
1 stop7h 25mSouthwest
Mon 4/711:55 amPHL - ONT
2 stops9h 30mSouthwest
Deal found 2/19$395
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/76:00 amONT - PHL
1 stop21h 01mAlaska Airlines
Tue 11/116:35 pmPHL - ONT
1 stop19h 04mAlaska Airlines
Deal found 2/19$416

Find flights from Ontario to Delaware within your budget

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 February 20, 2025.

Fly from

Ontario

Fly to

Delaware

Route

Depart

Return

Price

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 3/5

2:43 pm-6:04 am

1 stop12h 21m

Philadelphia

Wed 3/12

7:45 am-3:04 pm

1 stop10h 19m

$130

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Mon 3/3

9:06 pm-2:49 pm

1 stop14h 43m

Philadelphia

Thu 3/6

7:35 am-3:04 pm

1 stop10h 29m

$183

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 4/16

12:10 pm-10:20 pm

1 stop7h 10m

Philadelphia

Wed 4/23

2:48 pm-11:41 pm

2 stops11h 53m

$348

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 4/2

5:00 am-5:25 pm

2 stops9h 25m

Philadelphia

Mon 4/7

12:50 pm-10:55 pm

2 stops13h 05m

$375

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sat 5/17

6:02 am-4:03 pm

1 stop7h 01m

Philadelphia

Sat 8/23

9:29 am-2:52 pm

1 stop8h 23m

$382

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 4/3

2:50 pm-1:15 am

1 stop7h 25m

Philadelphia

Mon 4/7

11:55 am-6:25 pm

2 stops9h 30m

$395

OntarioSalisbury

ONT - SBY

ONTSBY

Ontario

Thu 7/31

12:57 am-4:31 pm

2 stops12h 34m

Salisbury-Ocean City

Tue 8/5

8:58 am-5:46 pm

2 stops11h 48m

$741

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 5/1

6:35 pm-6:52 am

1 stop9h 17m

$65

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 4/22

10:15 pm-9:21 am

1 stop8h 06m

$172

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 3/12

6:00 am-9:20 pm

2 stops12h 20m

$179

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 14 results
1
2

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.

Travel insights for flights from Ontario to Delaware

Get recent, data-driven insights about flights from Ontario to Delaware including ideal travel times, pricing trends, and more.

Rainfall in Delaware by month

Plan your trip to Delaware by taking into account the average rainfall totals by month.

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.

Temperature in Delaware by month

Plan your trip to Delaware by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Delaware

Get insights into the airlines that provide service to Delaware. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Delaware. Reviews last updated February 20, 2025.
See what other customers who have flown with Southwest, Alaska Airlines and Delta from Ontario to Delaware have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Overall

8.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Reviews

1 / 20

10.0
Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Overall

8.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Reviews

1 / 20

10.0
Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Alaska Airlines
8.0
Very good
9,697 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Overall

8.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Reviews

1 / 20

10.0
Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Delta
8.0
Very good
8,219 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Overall

8.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Reviews

1 / 20

10.0
Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Overall

8.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Reviews

1 / 20

10.0
Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

United Airlines
7.4
Good
8,765 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Overall

8.1

Entertainment

7.6

Comfort

8.1

Crew

8.7

Reviews

1 / 20

10.0
Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

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.

  • What are the cheapest airlines to fly from Ontario to Delaware one-way?

    The cheapest airlines for a one-way flight from Ontario to Delaware are Frontier ($65), Delta ($172), and United Airlines ($179).

  • 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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