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$182+ 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
ILM — ONT
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
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 septiembre 16, 2025.

Round-trip from

$339
(American Airlines)

One-way from

$182
(Kiwi.com)

Popular in

May

Cheapest in

February

Average price

$463
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. 17% potential increase in price ($99 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in September 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 septiembre 16, 2025.

This American Airlines deal was found by Cheapflights users on 9/15. 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. 10/297:00 amILM - ONT
1 stop7h 57mAmerican Airlines
mié. 11/126:10 amONT - ILM
1 stop7h 33mAmerican Airlines
Deal found 9/15$339
This Delta deal was found by Cheapflights users on 9/15. 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. 10/26:00 amILM - ONT
1 stop7h 42mDelta
lun. 10/610:00 pmONT - ILM
1 stop8h 31mDelta
Deal found 9/15$399
This American Airlines deal was found by Cheapflights users on 9/15. 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.
sáb. 10/42:50 pmILM - ONT
2 stops10h 43mAmerican Airlines
mié. 10/810:29 pmONT - ILM
1 stop6h 42mAmerican Airlines
Deal found 9/15$404
This Delta deal was found by Cheapflights users on 9/15. 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. 10/26:50 amILM - ONT
2 stops18h 33mDelta
mar. 10/710:00 pmONT - ILM
1 stop8h 31mDelta
Deal found 9/15$417
This Delta deal was found by Cheapflights users on 9/15. 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.
mar. 12/166:01 pmILM - ONT
1 stop8h 02mDelta
lun. 12/225:10 pmONT - ILM
2 stops14h 10mDelta
Deal found 9/15$427
This Delta deal was found by Cheapflights users on 9/15. 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.
mié. 10/12:36 pmILM - ONT
1 stop7h 39mDelta
dom. 10/510:00 pmONT - ILM
1 stop8h 31mDelta
Deal found 9/15$429
This Delta deal was found by Cheapflights users on 9/15. 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.
mar. 9/232:36 pmILM - ONT
1 stop7h 39mDelta
mié. 10/110:00 pmONT - ILM
1 stop8h 27mDelta
Deal found 9/15$447
This Delta deal was found by Cheapflights users on 9/15. 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.
mar. 12/166:01 pmILM - ONT
1 stop8h 02mDelta
mié. 12/2411:45 amONT - ILM
1 stop5h 57mDelta
Deal found 9/15$458
This Delta deal was found by Cheapflights users on 9/15. 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.
sáb. 9/206:00 amILM - ONT
1 stop7h 42mDelta
mié. 10/110:00 pmONT - ILM
1 stop8h 27mDelta
Deal found 9/15$459
This Delta deal was found by Cheapflights users on 9/15. 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.
mar. 9/166:00 amILM - ONT
1 stop7h 42mDelta
mié. 9/2410:00 pmONT - ILM
1 stop8h 27mDelta
Deal found 9/15$465

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 septiembre 16, 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

sáb. 10/4

6:00 am-10:42 am

1 stop7h 42m

Ontario

lun. 10/6

10:00 pm-9:31 am

1 stop8h 31m

$399

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

sáb. 10/4

6:00 am-10:42 am

1 stop7h 42m

Ontario

mar. 10/7

10:00 pm-9:31 am

1 stop8h 31m

$399

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

vie. 10/3

5:45 pm-10:23 pm

1 stop7h 38m

Ontario

mié. 10/8

10:00 pm-9:31 am

1 stop8h 31m

$399

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

sáb. 10/4

6:00 am-10:42 am

1 stop7h 42m

Ontario

mié. 10/8

10:00 pm-9:31 am

1 stop8h 31m

$399

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

jue. 10/2

6:00 am-10:42 am

1 stop7h 42m

Ontario

lun. 10/6

10:00 pm-9:31 am

1 stop8h 31m

$399

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

mié. 10/1

2:36 pm-7:15 pm

1 stop7h 39m

Ontario

mié. 10/8

10:00 pm-9:31 am

1 stop8h 31m

$399

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

vie. 10/3

2:36 pm-7:15 pm

1 stop7h 39m

Ontario

lun. 10/6

10:00 pm-9:31 am

1 stop8h 31m

$399

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

mié. 10/1

2:36 pm-7:15 pm

1 stop7h 39m

Ontario

lun. 10/6

10:00 pm-9:31 am

1 stop8h 31m

$399

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

dom. 9/21

3:35 pm-7:54 pm

2 stops31h 19m

$182

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

vie. 10/31

4:22 pm-8:44 pm

2 stops31h 22m

$251

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 14 results
1
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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 $327). 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.

How much does it cost to fly round-trip from Wilmington to Ontario?

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 septiembre 16, 2025.
Peruse reviews from past customers who have flown with Delta and American 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.
Delta
8.0
Very good
7,957 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,957 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • How long is the flight from Wilmington to Ontario?

    For as low as $399, Delta can have you in Ontario from Wilmington in 7h 42m. The distance between Wilmington and Ontario is about 2253 mi.

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

    Cheapflights users have booked flights from Wilmington to Ontario round-trip from $308. Another airline that can offer you cheap pricing is American Airlines. Delta is priced at 32% lower than the current average price of a flight leaving 3 months from now.

  • 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 $327). 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 septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$308Average$458FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$333Average$433FlexibilityNo cancel feeOn-time71%

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