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$165+ 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
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$244
(KAYAK)

One-way from

$165
(Hawaiian Airlines)

Popular in

July

Cheapest in

November

Average price

$400
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 ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 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 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 September 11, 2025.

This KAYAK deal was found by Cheapflights users on 9/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/102:00 pmBIL - ONT
1 stop7h 53mAlaska Airlines
Wed 11/126:00 amONT - BIL
1 stop8h 00mAlaska Airlines
Deal found 9/11$244
This Hawaiian Airlines deal was found by Cheapflights users on 9/10. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/102:00 pmBIL - ONT
1 stop7h 53mHawaiian Airlines
Wed 11/126:00 amONT - BIL
1 stop8h 00mHawaiian Airlines
Deal found 9/10$260
This Delta deal was found by Cheapflights users on 9/10. 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.
Wed 11/126:24 pmBIL - ONT
1 stop6h 28mDelta
Tue 12/24:49 pmONT - BIL
1 stop6h 33mDelta
Deal found 9/10$261
This Alaska Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 11/152:00 pmBIL - ONT
1 stop7h 53mAlaska Airlines
Wed 12/36:00 amONT - BIL
1 stop7h 56mAlaska Airlines
Deal found 9/10$286
This Delta deal was found by Cheapflights users on 9/9. 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.
Wed 9/2411:33 amBIL - ONT
1 stop5h 24mDelta
Thu 10/29:50 amONT - BIL
1 stop6h 49mDelta
Deal found 9/9$291
This Alaska Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 11/136:00 amBIL - ONT
1 stop6h 05mAlaska Airlines
Wed 12/36:00 amONT - BIL
1 stop7h 56mAlaska Airlines
Deal found 9/10$295
This Hawaiian Airlines deal was found by Cheapflights users on 9/10. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/237:15 pmBIL - ONT
1 stop5h 48mHawaiian Airlines
Sun 10/267:20 amONT - BIL
1 stop5h 00mHawaiian Airlines
Deal found 9/10$296
This Delta deal was found by Cheapflights users on 9/10. 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.
Sat 11/156:24 pmBIL - ONT
1 stop4h 11mDelta
Tue 12/24:49 pmONT - BIL
1 stop6h 33mDelta
Deal found 9/10$305
This Delta deal was found by Cheapflights users on 9/10. 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.
Wed 11/126:24 pmBIL - ONT
1 stop6h 28mDelta
Fri 11/286:00 amONT - BIL
1 stop4h 02mDelta
Deal found 9/10$311
This Delta deal was found by Cheapflights users on 9/10. 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.
Wed 11/126:24 pmBIL - ONT
1 stop6h 28mDelta
Thu 11/276:45 amONT - BIL
2 stops9h 48mDelta
Deal found 9/10$316
This Delta deal was found by Cheapflights users on 9/9. 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.
Wed 9/2411:33 amBIL - ONT
1 stop5h 24mDelta
Sun 9/286:00 amONT - BIL
1 stop3h 53mDelta
Deal found 9/9$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 September 11, 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

Mon 11/10

2:00 pm-8:53 pm

1 stop7h 53m

Ontario

Wed 11/12

6:00 am-3:00 pm

1 stop8h 00m

$244

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Tue 11/18

6:00 am-11:05 am

1 stop6h 05m

Ontario

Wed 12/3

6:00 am-2:56 pm

1 stop7h 56m

$260

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Wed 11/12

2:00 pm-8:53 pm

1 stop7h 53m

Ontario

Wed 12/3

6:00 am-2:56 pm

1 stop7h 56m

$260

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Tue 11/18

6:24 pm-11:52 pm

1 stop6h 28m

Ontario

Thu 11/27

6:00 am-11:02 am

1 stop4h 02m

$261

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Sat 11/15

2:00 pm-8:53 pm

1 stop7h 53m

Ontario

Wed 12/3

6:00 am-2:56 pm

1 stop7h 56m

$286

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Fri 9/26

6:19 pm-11:42 pm

1 stop6h 23m

Ontario

Thu 10/2

6:00 am-10:53 am

1 stop3h 53m

$291

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Fri 9/26

6:19 pm-11:42 pm

1 stop6h 23m

Ontario

Wed 10/1

6:00 am-10:53 am

1 stop3h 53m

$291

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Wed 9/24

11:33 am-3:57 pm

1 stop5h 24m

Ontario

Thu 10/2

9:50 am-5:39 pm

1 stop6h 49m

$291

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Wed 9/24

5:25 am-8:58 am

1 stop4h 33m

Ontario

Wed 10/1

4:40 pm-10:35 pm

1 stop4h 55m

$291

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Wed 9/24

6:19 pm-11:42 pm

1 stop6h 23m

Ontario

Tue 9/30

6:00 am-10:53 am

1 stop3h 53m

$291

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 19 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 September 11, 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.

How much does it cost to fly round-trip from Billings 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 September 11, 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

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Entertainment

7.0

Comfort

7.8

Food

7.1

Boarding

8.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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.

  • How long is the flight from Billings to Ontario?

    For as low as $261, Alaska Airlines can have you in Ontario from Billings in 6h 28m. The distance between Billings and Ontario is about 941 mi. This flight may include one or multiple stops.

  • 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.

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

    The cheapest airline one-way is Hawaiian Airlines, with whom users have recently found tickets for as low as $165. However, be on the lookout for offers from United Airlines and Delta, as they are both options that can get you from Billings to Ontario for a low price.

  • 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.

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$82Average$263FlexibilityNo cancel feeOn-time75%
DeltaCheapest$244Average$345FlexibilityNo cancel feeOn-timeN/A

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