What is the cheapest airline to fly from Wilmington to Ontario round-trip?

Cheapflights users have booked flights from Wilmington to Ontario round-trip from $369. Delta is priced at 21% lower than the current average price of a flight leaving 3 months from now.

What is the cheapest day to fly from Wilmington to Ontario?

Travelers seeking maximum savings on their Wilmington to Ontario flight should consider departing on Saturday mornings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

What is the cheapest day to fly round-trip from Wilmington to Ontario?

Departing on a Friday is a good option for securing a great price. You can expect to save up to 67% when planning your travel around this day of the week.

How far in advance should I book a flight from Wilmington to Ontario?

Users have found that booking a flight from Wilmington to Ontario at least 40 days early can save you up to 43% on average compared to booking a flight this week. If booking 40 days before your flight isn’t an option for you, users have found flights from Wilmington to Ontario for as little as $413 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $454 for flights departing within the next 3 days.

What is the cheapest month to fly from Wilmington to Ontario?

The best pricing can be found in the month of August. Prices to Ontario from Wilmington average $470. You can even find prices in August for less than $470, as users have found deals to Ontario from as low as $308. The month of December appears to be one of the more expensive times to travel to Ontario from Wilmington. Flying in the targeted month can save you up to 24%.

What is the cheapest time of day to fly from ILM to ONT?

Unlike at noon, when flights are generally more expensive, you can save up to 4% on flights from Wilmington to Ontario by exploring options for tickets in the morning.

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.

$194+ Flights from Wilmington to Ontario

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Cheap flight deals from Wilmington to Ontario

Round-trip from	$369 (Delta)
One-way from	$194 (Trip.com)
Popular in	May
Cheapest in	February
Average price	$428

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. 15% potential increase in price ($86 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).

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Average for round-trip flights in August 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 August 7, 2025.

Sun 9/146:00 amILM - ONT

1 stop7h 42mDelta

Wed 9/177:05 amONT - ILM

1 stop6h 46mDelta

Deal found 8/6

$369

Thu 8/214:23 pmILM - ONT

1 stop8h 05mAmerican Airlines

Mon 8/2511:59 pmONT - ILM

1 stop8h 46mAmerican Airlines

Deal found 8/6

$429

Thu 8/212:35 pmILM - ONT

1 stop7h 36mDelta

Mon 8/254:50 pmONT - ILM

2 stops13h 52mDelta

Deal found 8/6

$434

Fri 9/57:05 amILM - ONT

2 stops13h 32mUnited Airlines

Fri 9/127:00 amONT - ILM

2 stops27h 53mUnited Airlines

Deal found 8/6

$527

Thu 8/217:10 amILM - ONT

2 stops13h 27mUnited Airlines

Mon 8/257:00 amONT - ILM

2 stops27h 43mUnited Airlines

Deal found 8/6

$537

Thu 8/287:10 amILM - ONT

2 stops13h 19mUnited Airlines

Wed 9/36:04 amONT - ILM

2 stops14h 05mUnited Airlines

Deal found 8/7

$568

Thu 8/74:59 pmILM - ONT

1 stop8h 07mUnited Airlines

Sat 8/96:00 amONT - ILM

2 stops13h 25mUnited Airlines

Deal found 8/6

$607

Wed 10/157:05 amILM - ONT

2 stops13h 35mUnited Airlines

Sat 10/187:02 amONT - ILM

2 stops13h 22mUnited Airlines

Deal found 8/7

$614

Best flights from Wilmington to Ontario
Discover carefully curated flight deals from Wilmington to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 7, 2025.

Sun 9/146:00 amILM - ONT

1 stop7h 42mDelta

Wed 9/177:05 amONT - ILM

1 stop6h 46mDelta

Deal found 8/6

$369

Thu 8/214:23 pmILM - ONT

1 stop8h 05mAmerican Airlines

Mon 8/2511:59 pmONT - ILM

1 stop8h 46mAmerican Airlines

Deal found 8/6

$429

Tue 11/46:00 amILM - ONT

1 stop7h 26mDelta

Sun 11/910:59 pmONT - ILM

1 stop7h 37mDelta

Deal found 8/5

$379

Fri 10/105:55 pmILM - ONT

1 stop7h 17mDelta

Mon 10/1310:29 pmONT - ILM

1 stop8h 02mDelta

Deal found 8/5

$394

Mon 9/152:36 pmILM - ONT

2 stops12h 06mDelta

Wed 9/177:05 amONT - ILM

1 stop6h 46mDelta

Deal found 8/5

$399

Thu 10/95:55 pmILM - ONT

1 stop7h 17mDelta

Wed 10/1510:29 pmONT - ILM

1 stop8h 02mDelta

Deal found 8/5

$428

Fri 10/105:55 pmILM - ONT

1 stop7h 17mDelta

Tue 10/1410:29 pmONT - ILM

2 stops14h 54mDelta

Deal found 8/5

$432

Thu 8/212:35 pmILM - ONT

1 stop7h 36mDelta

Mon 8/254:50 pmONT - ILM

2 stops13h 52mDelta

Deal found 8/6

$434

Thu 10/95:55 pmILM - ONT

1 stop7h 17mDelta

Tue 10/1410:29 pmONT - ILM

2 stops14h 54mDelta

Deal found 8/5

$466

Last-minute flights from Wilmington to Ontario
Discover last-minute flight deals from Wilmington to Ontario. Data last updated August 7, 2025 and is based on user searches.

Thu 8/74:59 pmILM - ONT

1 stop8h 07mUnited Airlines

Sat 8/96:00 amONT - ILM

2 stops13h 25mUnited Airlines

Deal found 8/6

$607

Sun 8/177:05 amILM - ONT

3 stops18h 47mUnited Airlines

Wed 8/205:10 amONT - ILM

3 stops29h 34mUnited Airlines

Deal found 8/6

$1,103

Thu 8/214:23 pmILM - ONT

1 stop8h 05mAmerican Airlines

Mon 8/2511:59 pmONT - ILM

1 stop8h 46mAmerican Airlines

Deal found 8/6

$429

Thu 8/212:35 pmILM - ONT

1 stop7h 36mDelta

Mon 8/254:50 pmONT - ILM

2 stops13h 52mDelta

Deal found 8/6

$434

Thu 8/217:10 amILM - ONT

2 stops13h 27mUnited Airlines

Mon 8/257:00 amONT - ILM

2 stops27h 43mUnited Airlines

Deal found 8/6

$537

Thu 8/287:10 amILM - ONT

2 stops13h 19mUnited Airlines

Wed 9/36:04 amONT - ILM

2 stops14h 05mUnited Airlines

Deal found 8/7

$568

Fri 9/57:05 amILM - ONT

2 stops13h 32mUnited Airlines

Fri 9/127:00 amONT - ILM

2 stops27h 53mUnited Airlines

Deal found 8/6

$527

Sun 9/146:00 amILM - ONT

1 stop7h 42mDelta

Wed 9/177:05 amONT - ILM

1 stop6h 46mDelta

Deal found 8/6

$369

Mon 9/152:36 pmILM - ONT

2 stops12h 06mDelta

Wed 9/177:05 amONT - ILM

1 stop6h 46mDelta

Deal found 8/5

$399

One-way flights from Wilmington to Ontario
Search for one-way flight options from Wilmington to Ontario. Find affordable one-way fares based on user searches. Data last updated August 7, 2025.

Mon 8/1812:06 pmILM - ONT

2 stops38h 44mMultiple Airlines

Deal found 8/5

$194

Thu 8/215:34 pmILM - ONT

1 stop7h 46mDelta

Deal found 8/6

$215

Thu 8/217:10 amILM - ONT

2 stops13h 27mUnited Airlines

Deal found 8/6

$220

Tue 8/125:34 pmILM - ONT

1 stop7h 46mDelta

Deal found 8/5

$229

Tue 8/127:05 amILM - ONT

2 stops13h 20mUnited Airlines

Deal found 8/5

$253

Sat 10/187:05 amILM - ONT

2 stops14h 01mUnited Airlines

Deal found 8/5

$293

Mon 8/184:59 pmILM - ONT

1 stop8h 07mUnited Airlines

Deal found 8/5

$310

Mon 8/182:16 pmILM - ONT

2 stops12h 59mAlaska Airlines

Deal found 8/7

$315

Fly from

Fly to

Route

Depart

Return

Price

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Sun 9/14

6:00 am-10:42 am

1 stop7h 42m

Ontario

Wed 9/17

7:05 am-4:51 pm

1 stop6h 46m

$369

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Tue 11/4

6:00 am-10:26 am

1 stop7h 26m

Ontario

Sun 11/9

10:59 pm-9:36 am

1 stop7h 37m

$379

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Fri 10/10

5:55 pm-10:12 pm

1 stop7h 17m

Ontario

Mon 10/13

10:29 pm-9:31 am

1 stop8h 02m

$394

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Mon 9/15

2:36 pm-11:42 pm

2 stops12h 06m

Ontario

Wed 9/17

7:05 am-4:51 pm

1 stop6h 46m

$399

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Thu 10/9

5:55 pm-10:12 pm

1 stop7h 17m

Ontario

Wed 10/15

10:29 pm-9:31 am

1 stop8h 02m

$428

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Thu 8/21

4:23 pm-9:28 pm

1 stop8h 05m

Ontario

Mon 8/25

11:59 pm-11:45 am

1 stop8h 46m

$429

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Fri 10/10

5:55 pm-10:12 pm

1 stop7h 17m

Ontario

Tue 10/14

10:29 pm-4:23 pm

2 stops14h 54m

$432

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Thu 8/21

2:35 pm-7:11 pm

1 stop7h 36m

Ontario

Mon 8/25

4:50 pm-9:42 am

2 stops13h 52m

$434

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Thu 10/9

5:55 pm-10:12 pm

1 stop7h 17m

Ontario

Tue 10/14

10:29 pm-4:23 pm

2 stops14h 54m

$466

WilmingtonOntario

ILM - ONT

ILMONT

Wilmington New Hanover County

Mon 8/18

12:06 pm-11:50 pm

2 stops38h 44m

$194

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/5

Showing 1-10 of 17 results

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

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

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

Delta

8.0

Very good

7,987 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

United Airlines

7.4

Good

8,916 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

Related info for your journey

What is the cheapest airline to fly from Wilmington to Ontario round-trip?
Cheapflights users have booked flights from Wilmington to Ontario round-trip from $369. Delta is priced at 21% 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 $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

Browse thousands of different options on Cheapflights for your next trip

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Other flights to Ontario

Top 2 airlines flying from Wilmington to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$308	Average$468	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$333	Average$433	FlexibilityNo cancel fee	On-time71%

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$194+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Wilmington to Ontario

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Find flight deals from Wilmington to Ontario

Cheapest flights from Wilmington to OntarioExplore 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 August 7, 2025.

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 August 7, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Wilmington to Ontario that are best for you.

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.

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?

Reviews of airlines servicing Ontario

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.

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 is the cheapest airline to fly from Wilmington to Ontario round-trip?

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

How can I find direct flights from Wilmington to Ontario?

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

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

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.

Top 2 airlines flying from Wilmington to Ontario

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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 August 7, 2025.