HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$125+ 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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
ILM — ONT
nov. 22 — nov. 291
sáb. 11/22
sáb. 11/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Wilmington to Ontario 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 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 octubre 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$368
(United Airlines)

One-way from

$125
(Kiwi.com)

Popular in

May

Cheapest in

February

Average price

$374
Provider with most accurate pricing for Wilmington New Hanover County-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Wilmington New Hanover County-Ontario flights.
Search Deals
From Wilmington New Hanover County to Ontario
Search Deals
One-way flight from Wilmington New Hanover County to Ontario
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($103 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 octubre 23, 2025.

This United Airlines deal was found by Cheapflights users on 10/21. 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.
mar. 11/46:25 amILM - ONT
2 stops15h 11mUnited Airlines
mié. 11/127:00 amONT - ILM
2 stops13h 50mUnited Airlines
Deal found 10/21$368
This Delta deal was found by Cheapflights users on 10/22. 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. 12/96:00 amILM - ONT
1 stop8h 02mDelta
sáb. 12/1312:12 pmONT - ILM
1 stop7h 22mDelta
Deal found 10/22$369
This Delta deal was found by Cheapflights users on 10/21. 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. 11/136:07 pmILM - ONT
1 stop7h 57mDelta
lun. 11/174:49 pmONT - ILM
2 stops13h 49mDelta
Deal found 10/21$374
This Delta deal was found by Cheapflights users on 10/22. 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. 12/911:45 amILM - ONT
2 stops14h 19mDelta
dom. 12/1410:25 pmONT - ILM
1 stop8h 16mDelta
Deal found 10/22$397
This Delta deal was found by Cheapflights users on 10/22. 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. 11/56:00 amILM - ONT
1 stop7h 26mDelta
mié. 11/127:05 amONT - ILM
1 stop7h 13mDelta
Deal found 10/22$399
This Delta deal was found by Cheapflights users on 10/21. 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.
lun. 11/35:55 pmILM - ONT
1 stop7h 27mDelta
mar. 11/114:49 pmONT - ILM
2 stops13h 49mDelta
Deal found 10/21$404
This American Airlines deal was found by Cheapflights users on 10/22. 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.
vie. 10/317:00 amILM - ONT
1 stop10h 01mAmerican Airlines
mié. 11/512:46 pmONT - ILM
1 stop6h 49mAmerican Airlines
Deal found 10/22$414
This Delta deal was found by Cheapflights users on 10/23. 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.
vie. 10/3111:30 amILM - ONT
2 stops12h 50mDelta
dom. 11/910:25 pmONT - ILM
1 stop8h 13mDelta
Deal found 10/23$419
This Delta deal was found by Cheapflights users on 10/22. 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. 11/16:00 amILM - ONT
1 stop7h 26mDelta
mié. 11/127:05 amONT - ILM
1 stop7h 13mDelta
Deal found 10/22$422
This Delta deal was found by Cheapflights users on 10/21. 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. 11/65:55 pmILM - ONT
1 stop7h 27mDelta
mar. 11/1110:25 pmONT - ILM
2 stops21h 06mDelta
Deal found 10/21$427

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 octubre 23, 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

jue. 12/11

6:00 am-11:02 am

1 stop8h 02m

Ontario

sáb. 12/13

12:12 pm-10:34 pm

1 stop7h 22m

$369

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

mié. 12/10

6:02 pm-11:04 pm

1 stop8h 02m

Ontario

sáb. 12/13

12:12 pm-10:34 pm

1 stop7h 22m

$369

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

vie. 12/12

2:23 pm-7:39 pm

1 stop8h 16m

Ontario

sáb. 12/13

12:12 pm-10:34 pm

1 stop7h 22m

$369

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

jue. 12/11

6:02 pm-11:04 pm

1 stop8h 02m

Ontario

lun. 12/15

10:25 pm-9:41 am

1 stop8h 16m

$369

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

mié. 12/10

2:23 pm-7:39 pm

1 stop8h 16m

Ontario

dom. 12/14

10:25 pm-9:41 am

1 stop8h 16m

$369

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

mar. 12/9

6:00 am-11:02 am

1 stop8h 02m

Ontario

lun. 12/15

10:25 pm-9:41 am

1 stop8h 16m

$369

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

jue. 12/11

6:00 am-11:02 am

1 stop8h 02m

Ontario

dom. 12/14

10:25 pm-9:41 am

1 stop8h 16m

$369

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

mar. 12/9

6:02 pm-11:04 pm

1 stop8h 02m

Ontario

dom. 12/14

10:25 pm-9:41 am

1 stop8h 16m

$369

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

vie. 12/5

3:17 pm-4:23 pm

2 stops52h 06m

$125

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

jue. 12/4

2:10 pm-1:10 pm

2 stops26h 00m

$161

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

Showing 1-10 of 18 results
1
2

Compare providers for flights from Wilmington to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Wilmington to Ontario in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Wilmington-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Wilmington-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Wilmington-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Wilmington-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Wilmington-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, June is the cheapest month in which you can book a flight from Wilmington to Ontario (average of $178). Flying from Wilmington to Ontario in December is currently the most expensive (average of $321). 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 octubre 23, 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
7.9
Good
7,982 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

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
7.9
Good
7,982 reviews
Delta
7.9
Good
7,982 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

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
11,032 reviews
Delta
7.9
Good
7,982 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

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 $369, Delta can have you in Ontario from Wilmington in 8h 02m. 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 $333. Another airline that can offer you cheap pricing is Delta. American Airlines is priced at 26% 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, June is the cheapest month in which you can book a flight from Wilmington to Ontario (average of $178). Flying from Wilmington to Ontario in December is currently the most expensive (average of $321). 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

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 Wilmington to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Charlotte to Las Vegas flights
Raleigh to Las Vegas flights
Raleigh to Los Angeles flights
Raleigh to San Francisco flights
Charlotte to Los Angeles flights
Charlotte to San Francisco flights
Norfolk to Las Vegas flights
Charlotte to San Diego flights
Charlotte to Ontario flights
Raleigh to Ontario flights
Raleigh to San Diego flights
Greensboro to Las Vegas flights
Knoxville to Las Vegas flights
Norfolk to Los Angeles flights
Raleigh to Santa Ana flights
Myrtle Beach to Las Vegas flights
Greensboro to Los Angeles flights
Charlotte to Sacramento flights
Charlotte to Santa Ana flights
Knoxville to Los Angeles flights
Norfolk to San Francisco flights
Knoxville to Ontario flights
Asheville to San Diego flights
Raleigh to Palm Springs flights
Asheville to Las Vegas flights
Raleigh to San Jose flights
Raleigh to Burbank flights
Charlotte to Palm Springs flights
Asheville to San Francisco flights
Raleigh to Reno flights
Charlotte to San Jose flights
Wilmington to Las Vegas flights
Norfolk to Ontario flights
Norfolk to San Diego flights
Asheville to Los Angeles flights
Charlotte to Burbank flights
Charlotte to Fresno flights
Wilmington to San Diego flights
Norfolk to Sacramento flights
Greensboro to Ontario flights
Knoxville to Sacramento flights
Knoxville to San Francisco flights
Asheville to San Jose flights
Raleigh to Sacramento flights
Norfolk to Santa Ana flights
Myrtle Beach to San Diego flights
Knoxville to San Diego flights
Raleigh to Oakland flights
Charlotte to Reno flights
Charlotte to Long Beach flights

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 octubre 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$333Average$429FlexibilityNo cancel feeOn-time71%
DeltaCheapest$364Average$458FlexibilityNo cancel feeOn-timeN/A

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.