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Delaware

$97+ 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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ILG
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$196
(Cheapflightsfares)

One-way from

$97
(Cheapflightsfares)

Popular in

March

Cheapest in

September

Average price

$417
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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. 10% potential increase in price ($44 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 29, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/287:37 pmONT - PHL
1 stop7h 01mFrontier
Tue 6/36:15 amPHL - ONT
1 stop7h 28mFrontier
Deal found 4/29$196
This Delta deal was found by Cheapflights users on 4/29. 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.
Tue 7/810:05 pmONT - PHL
1 stop8h 28mDelta
Wed 7/166:45 amPHL - ONT
1 stop6h 55mDelta
Deal found 4/29$307
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Tue 5/206:00 amONT - PHL
1 stop8h 16mUnited Airlines
Sun 5/256:15 amPHL - ONT
2 stops9h 16mUnited Airlines
Deal found 4/28$329
This Southwest deal was found by Cheapflights users on 4/29. 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.
Wed 7/239:35 pmONT - PHL
2 stops8h 50mSouthwest
Fri 7/2510:10 amPHL - ONT
1 stop7h 35mSouthwest
Deal found 4/29$377
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
Mon 9/87:10 amONT - PHL
2 stops19h 50mAlaska Airlines
Thu 9/117:20 amPHL - ONT
1 stop9h 49mAlaska Airlines
Deal found 4/29$405
This American Airlines deal was found by Cheapflights users on 4/27. 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.
Thu 7/316:15 amONT - SBY
2 stops11h 15mAmerican Airlines
Sun 8/35:25 pmSBY - ONT
1 stop7h 13mAmerican Airlines
Deal found 4/27$652

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 April 29, 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 5/28

7:37 pm-5:38 am

1 stop7h 01m

Philadelphia

Tue 6/3

6:15 am-10:43 am

1 stop7h 28m

$196

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 7/8

10:05 pm-9:33 am

1 stop8h 28m

Philadelphia

Wed 7/16

6:45 am-10:40 am

1 stop6h 55m

$307

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 5/20

6:00 am-5:16 pm

1 stop8h 16m

Philadelphia

Sun 5/25

6:15 am-12:31 pm

2 stops9h 16m

$329

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 7/23

9:35 pm-9:25 am

2 stops8h 50m

Philadelphia

Fri 7/25

10:10 am-2:45 pm

1 stop7h 35m

$377

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Mon 9/8

7:10 am-6:00 am

2 stops19h 50m

Philadelphia

Thu 9/11

7:20 am-2:09 pm

1 stop9h 49m

$405

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sun 5/11

11:59 pm-11:40 am

1 stop8h 41m

Philadelphia

Thu 5/15

5:45 pm-9:57 pm

1 stop7h 12m

$501

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 5/28

7:37 pm-5:38 am

1 stop7h 01m

$97

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 8/12

4:00 pm-5:25 am

1 stop10h 25m

$153

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 5/27

12:18 pm-10:55 pm

1 stop7h 37m

$154

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 7/8

4:00 pm-5:25 am

1 stop10h 25m

$198

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 15 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.

Cheapflights Insights

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

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 April 29, 2025.
See what other customers who have flown with Alaska Airlines, Southwest 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.
Alaska Airlines
8.0
Very good
9,961 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,295 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,929 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,405 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 ($97), Alaska Airlines ($153), and Delta ($154).

  • 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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