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Delaware

$135+ 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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ILG
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$215
(Frontier)

One-way from

$135
(FlightHub)

Popular in

December

Cheapest in

September

Average price

$381
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. 7% potential increase in price ($31 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 June 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 junio 12, 2025.

This Frontier deal was found by Cheapflights users on 6/12. 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.
jue. 8/75:14 pmONT - PHL
1 stop9h 35mFrontier
lun. 8/117:19 amPHL - ONT
1 stop7h 34mFrontier
Deal found 6/12$215
This Alaska Airlines deal was found by Cheapflights users on 6/9. 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.
jue. 9/183:04 pmONT - PHL
1 stop11h 56mAlaska Airlines
mar. 9/236:58 pmPHL - ONT
1 stop18h 46mAlaska Airlines
Deal found 6/9$296
This American Airlines deal was found by Cheapflights users on 6/11. 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.
lun. 8/411:59 pmONT - PHL
1 stop9h 56mAmerican Airlines
mié. 8/137:15 amPHL - ONT
1 stop7h 17mAmerican Airlines
Deal found 6/11$297
This Delta deal was found by Cheapflights users on 6/9. 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.
jue. 9/189:55 amONT - PHL
2 stops10h 08mDelta
mar. 9/2312:35 pmPHL - ONT
1 stop10h 07mDelta
Deal found 6/9$302
This United Airlines deal was found by Cheapflights users on 6/10. 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.
mié. 7/26:28 pmONT - PHL
1 stop8h 09mUnited Airlines
vie. 7/412:19 pmPHL - ONT
2 stops11h 35mUnited Airlines
Deal found 6/10$352
This American Airlines deal was found by Cheapflights users on 6/10. 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.
mié. 6/2510:28 pmONT - SBY
1 stop9h 14mAmerican Airlines
lun. 6/305:29 pmSBY - ONT
1 stop7h 04mAmerican Airlines
Deal found 6/10$659

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 junio 12, 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

jue. 8/7

5:14 pm-5:49 am

1 stop9h 35m

Philadelphia

lun. 8/11

7:19 am-11:53 am

1 stop7h 34m

$215

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

jue. 9/18

3:04 pm-6:00 am

1 stop11h 56m

Philadelphia

mar. 9/23

6:58 pm-10:44 am

1 stop18h 46m

$296

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

lun. 8/4

11:59 pm-12:55 pm

1 stop9h 56m

Philadelphia

mié. 8/13

7:15 am-11:32 am

1 stop7h 17m

$297

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

jue. 9/18

9:55 am-11:03 pm

2 stops10h 08m

Philadelphia

mar. 9/23

12:35 pm-7:42 pm

1 stop10h 07m

$302

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

mié. 7/2

6:28 pm-5:37 am

1 stop8h 09m

Philadelphia

vie. 7/4

12:19 pm-8:54 pm

2 stops11h 35m

$352

OntarioSalisbury

ONT - SBY

ONTSBY

Ontario

mié. 6/25

10:28 pm-10:42 am

1 stop9h 14m

Salisbury-Ocean City

lun. 6/30

5:29 pm-9:33 pm

1 stop7h 04m

$659

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

jue. 8/28

5:38 pm-5:45 am

1 stop9h 07m

$135

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

mié. 7/2

7:00 am-5:15 am

1 stop19h 15m

$144

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

jue. 11/27

12:00 pm-12:23 am

1 stop9h 23m

$149

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

dom. 8/17

11:59 pm-11:36 am

1 stop8h 37m

$184

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 16 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 junio 12, 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
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

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
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

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 ($135), Delta ($149), and American Airlines ($184).

  • 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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