HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Delaware

$49+ 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 7/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ILG
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

Keep the following information in mind while searching for Ontario to Delaware flight deals. Data was last updated July 3, 2025.

Round-trip from

$161
(Priceline)

One-way from

$49
(Priceline)

Popular in

December

Cheapest in

September

Average price

$375
From Ontario to Delaware
Search Deals
One-way flight from Ontario to Delaware
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($33 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 3, 2025.

This Priceline deal was found by Cheapflights users on 7/1. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/167:22 pmONT - PHL
1 stop7h 27mFrontier
Sat 7/267:19 amPHL - ONT
1 stop12h 01mFrontier
Deal found 7/1$161
This American Airlines deal was found by Cheapflights users on 7/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/16:10 amONT - SBY
2 stops12h 50mAmerican Airlines
Wed 11/55:00 amSBY - ONT
2 stops11h 42mAmerican Airlines
Deal found 7/2$573

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 July 3, 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 7/16

7:22 pm-5:49 am

1 stop7h 27m

Philadelphia

Sat 7/26

7:19 am-4:20 pm

1 stop12h 01m

$161

OntarioSalisbury

ONT - SBY

ONTSBY

Ontario

Sat 11/1

6:10 am-10:00 pm

2 stops12h 50m

Salisbury-Ocean City

Wed 11/5

5:00 am-1:42 pm

2 stops11h 42m

$573

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 7/30

7:22 pm-5:49 am

1 stop7h 27m

$49

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 8/21

6:00 am-11:59 pm

1 stop14h 59m

$145

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 10/29

4:09 pm-5:40 am

1 stop10h 31m

$171

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Mon 8/25

4:50 pm-5:45 am

1 stop9h 55m

$172

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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
No data available for this route at this time. Please check back soon.

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 July 3, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and American Airlines from Ontario to Delaware by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

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

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

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
7,982 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Frontier
5.9
Fair
3,286 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

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 ($49), Alaska Airlines ($171), and Delta ($172).

  • 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

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.
Los Angeles to John F Kennedy Intl flights
Los Angeles to Seattle flights
Los Angeles to Newark flights
Los Angeles to Honolulu flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to San Francisco flights
San Francisco to Las Vegas flights
San Francisco to John F Kennedy Intl flights
San Francisco to Los Angeles flights
Ontario to Seattle flights
Los Angeles to O'Hare Intl flights
Los Angeles to Las Vegas flights
San Francisco to Newark flights
Los Angeles to LaGuardia flights
Santa Ana to San Francisco flights
San Francisco to Seattle flights
Los Angeles to Boston flights
Los Angeles to Orlando flights
Los Angeles to Portland flights
Los Angeles to Miami flights
Los Angeles to San Jose flights
San Francisco to Santa Ana flights
Santa Ana to Seattle flights
Santa Ana to Las Vegas flights
San Jose to Los Angeles flights
Ontario to John F Kennedy Intl flights
San Jose to Seattle flights
San Francisco to Honolulu flights
Oakland to Las Vegas flights
Burbank to Las Vegas flights
San Jose to Las Vegas flights
Los Angeles to Denver flights
Los Angeles to Oakland flights
Ontario to San Francisco flights
San Francisco to O'Hare Intl flights
Oakland to Los Angeles flights
Oakland to Seattle flights
Los Angeles to Atlanta flights
San Francisco to LaGuardia flights
San Francisco to Dallas/Fort Worth flights
Ontario to Honolulu flights
San Francisco to San Diego flights
Burbank to Newark flights
San Diego to John F Kennedy Intl flights
Santa Ana to Newark flights
Los Angeles to Dulles Intl flights
Los Angeles to Fort Lauderdale flights
Los Angeles to Hobby flights
Los Angeles to Salt Lake City flights
Ontario to O'Hare 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.