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$265+ Cheap flights from Wilmington to Ontario (ILM - ONT)

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 7/17. Fares are subject to change and may not be available on all flights or dates of travel.
ILM — ONT
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
1 adult, Economy
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Cheap flight deals from Wilmington to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Wilmington (ILM) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 1, 2025.

Round-trip from

$369
(American Airlines)

One-way from

$265
(United Airlines)

Popular in

May

Cheapest in

February

Average price

$451
From Wilmington New Hanover County to Ontario
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One-way flight from Wilmington New Hanover County to Ontario
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Highest demand for flights based on searches. 11% potential increase in price ($64 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Wilmington to Ontario

Cheapest flights from Wilmington to Ontario
Explore the most affordable flight options available from Wilmington to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/196:43 amILM - ONT
1 stop8h 12mAmerican Airlines
Thu 9/256:10 amONT - ILM
1 stop7h 23mAmerican Airlines
Deal found 7/1$369
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/115:51 pmILM - ONT
1 stop7h 36mDelta
Sat 7/1211:40 amONT - ILM
1 stop7h 12mDelta
Deal found 7/1$494
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/314:59 pmILM - ONT
1 stop8h 07mUnited Airlines
Wed 8/66:31 pmONT - ILM
2 stops17h 53mUnited Airlines
Deal found 7/1$602
This Alaska Airlines deal was found by Cheapflights users on 6/30. 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 9/191:29 pmILM - ONT
2 stops13h 25mAlaska Airlines
Sun 9/213:06 pmONT - ILM
2 stops16h 48mAlaska Airlines
Deal found 6/30$863

Cheapflights Fare Finder

Customize your flight search to find flights from Wilmington to Ontario 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 1, 2025.
Use the filters below to find and compare flights from Wilmington to Ontario that are best for you.

Fly from

Wilmington

Fly to

Ontario

Route

Depart

Return

Price

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Fri 9/19

6:43 am-11:55 am

1 stop8h 12m

Ontario

Thu 9/25

6:10 am-4:33 pm

1 stop7h 23m

$369

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Fri 7/11

5:51 pm-10:27 pm

1 stop7h 36m

Ontario

Sat 7/12

11:40 am-9:52 pm

1 stop7h 12m

$494

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Thu 7/31

4:59 pm-10:06 pm

1 stop8h 07m

Ontario

Wed 8/6

6:31 pm-3:24 pm

2 stops17h 53m

$602

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Fri 9/19

1:29 pm-11:54 pm

2 stops13h 25m

Ontario

Sun 9/21

3:06 pm-10:54 am

2 stops16h 48m

$863

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Wed 7/9

4:59 pm-10:06 pm

1 stop8h 07m

$288

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Sat 7/19

7:00 am-10:30 am

1 stop6h 30m

$350

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Sat 7/19

5:44 pm-10:34 pm

1 stop7h 50m

$451

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Best time to book a flight from Wilmington to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Wilmington 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 Wilmington to Ontario

What is the cheapest month to book a flight from Wilmington to Ontario?

Currently, August is the cheapest month in which you can book a flight from Wilmington to Ontario (average of $246). Flying from Wilmington to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated July 1, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and United Airlines from Wilmington to Ontario to help guide your decision. 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

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

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

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

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
7,973 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

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
8,858 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

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

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

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 Wilmington to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Wilmington to Ontario round-trip?

    Cheapflights users have booked flights from Wilmington to Ontario round-trip from $369. Other airlines that can offer you cheap pricing are United Airlines, from $602, and Alaska Airlines, from $863. American Airlines is priced at 24% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airlines for a one-way flight from Wilmington to Ontario are United Airlines ($265), Delta ($350), and Alaska Airlines ($434).

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

    Yes. In addition to deals on Wilmington to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Wilmington to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Wilmington to Ontario.

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

    Yes. Cheapflights offers flight deals from Wilmington to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Wilmington to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Wilmington to Ontario (average of $246). Flying from Wilmington to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 2 airlines flying from Wilmington to Ontario

Discover the top 2 airlines that operate flights from Wilmington to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$308Average$463FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$333Average$465FlexibilityNo cancel feeOn-time71%

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