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$164+ Cheap flights from Billings to Ontario (BIL - 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 10/30. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ONT
août 21 — août 281
jeu. 8/21
jeu. 8/28
1 adult, Economy
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Cheap flight deals from Billings to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Billings (BIL) 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 août 16, 2025.

Round-trip from

$240
(Alaska Airlines)

One-way from

$164
(Hawaiian Airlines)

Popular in

July

Cheapest in

November

Average price

$368
From Billings Logan Intl to Ontario
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One-way flight from Billings Logan Intl to Ontario
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Highest demand for flights based on searches. 9% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($15 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 Billings to Ontario

Cheapest flights from Billings to Ontario
Explore the most affordable flight options available from Billings to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on août 16, 2025.

This Alaska Airlines deal was found by Cheapflights users on 8/14. 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.
mar. 12/91:25 pmBIL - ONT
1 stop5h 52mAlaska Airlines
mer. 12/177:00 amONT - BIL
1 stop5h 15mAlaska Airlines
Deal found 8/14$240
This Delta deal was found by Cheapflights users on 8/14. 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. 12/85:59 pmBIL - ONT
1 stop6h 47mDelta
lun. 12/155:05 pmONT - BIL
1 stop4h 27mDelta
Deal found 8/14$241
This Alaska Airlines deal was found by Cheapflights users on 8/14. 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.
sam. 12/137:40 amBIL - ONT
1 stop8h 32mAlaska Airlines
mar. 12/164:05 pmONT - BIL
1 stop5h 38mAlaska Airlines
Deal found 8/14$259
This Delta deal was found by Cheapflights users on 8/14. 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.
sam. 12/135:59 pmBIL - ONT
1 stop5h 47mDelta
lun. 12/155:05 pmONT - BIL
1 stop4h 27mDelta
Deal found 8/14$260
This Delta deal was found by Cheapflights users on 8/14. 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. 12/85:59 pmBIL - ONT
1 stop6h 47mDelta
dim. 12/145:05 pmONT - BIL
1 stop4h 27mDelta
Deal found 8/14$270
This Alaska Airlines deal was found by Cheapflights users on 8/14. 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.
dim. 12/71:25 pmBIL - ONT
1 stop5h 52mAlaska Airlines
mer. 12/177:00 amONT - BIL
1 stop5h 15mAlaska Airlines
Deal found 8/14$284
This Delta deal was found by Cheapflights users on 8/15. 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.
sam. 11/225:59 pmBIL - ONT
1 stop5h 47mDelta
lun. 12/15:05 pmONT - BIL
1 stop4h 27mDelta
Deal found 8/15$285
This Delta deal was found by Cheapflights users on 8/14. 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.
sam. 12/135:59 pmBIL - ONT
1 stop5h 47mDelta
dim. 12/145:05 pmONT - BIL
1 stop4h 27mDelta
Deal found 8/14$289
This Delta deal was found by Cheapflights users on 8/14. 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.
ven. 10/35:25 amBIL - ONT
1 stop4h 32mDelta
lun. 10/64:35 pmONT - BIL
1 stop4h 50mDelta
Deal found 8/14$291
This Delta deal was found by Cheapflights users on 8/14. 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.
sam. 12/135:59 pmBIL - ONT
1 stop5h 47mDelta
ven. 12/195:05 pmONT - BIL
1 stop4h 27mDelta
Deal found 8/14$304
This Alaska Airlines deal was found by Cheapflights users on 8/14. 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.
mer. 12/107:40 amBIL - ONT
2 stops13h 07mAlaska Airlines
mer. 12/177:00 amONT - BIL
1 stop5h 15mAlaska Airlines
Deal found 8/14$317
This Delta deal was found by Cheapflights users on 8/13. 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.
sam. 8/306:08 pmBIL - ONT
1 stop5h 32mDelta
dim. 9/74:50 pmONT - BIL
1 stop4h 57mDelta
Deal found 8/13$321

Cheapflights Fare Finder

 
Customize your flight search to find flights from Billings 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 août 16, 2025.
Use the filters below to find and compare flights from Billings to Ontario that are best for you.

Fly from

Billings

Fly to

Ontario

Route

Depart

Return

Price

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

mer. 12/10

3:35 pm-7:47 pm

1 stop5h 12m

Ontario

mar. 12/16

6:00 am-12:51 pm

1 stop5h 51m

$240

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

mer. 11/5

6:00 am-11:05 am

1 stop6h 05m

Ontario

mer. 11/12

4:11 pm-12:07 am

1 stop6h 56m

$240

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

mer. 12/10

1:25 pm-6:17 pm

1 stop5h 52m

Ontario

jeu. 12/18

7:00 am-2:47 pm

1 stop6h 47m

$240

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

mer. 12/10

3:35 pm-7:47 pm

1 stop5h 12m

Ontario

mer. 12/17

7:00 am-1:15 pm

1 stop5h 15m

$240

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

mar. 12/9

1:25 pm-6:17 pm

1 stop5h 52m

Ontario

mar. 12/16

6:00 am-12:51 pm

1 stop5h 51m

$240

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

mar. 12/9

1:25 pm-6:17 pm

1 stop5h 52m

Ontario

mer. 12/17

7:00 am-1:15 pm

1 stop5h 15m

$240

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

mar. 12/9

3:35 pm-7:47 pm

1 stop5h 12m

Ontario

jeu. 12/18

7:00 am-2:47 pm

1 stop6h 47m

$240

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

mer. 11/19

5:59 pm-11:46 pm

1 stop6h 47m

Ontario

lun. 11/24

5:05 pm-10:32 pm

1 stop4h 27m

$241

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

mer. 12/10

5:59 pm-11:46 pm

1 stop6h 47m

Ontario

lun. 12/15

5:05 pm-10:32 pm

1 stop4h 27m

$241

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

lun. 12/8

5:59 pm-11:46 pm

1 stop6h 47m

Ontario

mer. 12/17

5:05 pm-10:32 pm

1 stop4h 27m

$241

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 20 results
1
2

Best time to book a flight from Billings to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Billings to Ontario (average of $246). Flying from Billings 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.

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

Find hourly flight availability from Billings to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated août 16, 2025.

A simple way to save on the total cost of your ticket is to fly from Billings to Ontario in the afternoon. If you’re flexible enough to do this you can expect to save up to 32% on your trip compared to booking a flight in the morning.

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 août 16, 2025.
See what other customers who have flown with Alaska Airlines and Delta from Billings to Ontario have to say. 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

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

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

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

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
7,985 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

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

Find useful and relevant information for your journey from Billings 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 Billings to Ontario round-trip?

    Our cheapest airline available from Billings to Ontario is Alaska Airlines. Our recent data shows that you can find tickets from as low as $82 on this airline. An additional option worth looking into is Delta, starting at $244. These flights start at 77% lower than the current average price 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Billings 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 Billings to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Billings to Ontario (average of $246). Flying from Billings 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 Billings to Ontario

Discover the top 2 airlines that operate flights from Billings 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 août 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$82Average$263FlexibilityNo cancel feeOn-time75%
DeltaCheapest$244Average$354FlexibilityNo cancel feeOn-timeN/A

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