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$120+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$241
(Delta)

One-way from

$120
(Hawaiian Airlines)

Popular in

July

Cheapest in

November

Average price

$283
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. 12% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Delta deal was found by Cheapflights users on 6/10. 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.
Fri 10/35:45 amBIL - ONT
1 stop4h 21mDelta
Mon 10/65:05 pmONT - BIL
1 stop4h 27mDelta
Deal found 6/10$241
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Wed 10/16:00 amBIL - ONT
1 stop5h 44mAlaska Airlines
Sat 10/46:00 amONT - BIL
1 stop8h 04mAlaska Airlines
Deal found 6/10$253
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/12:30 pmBIL - ONT
1 stop6h 54mUnited Airlines
Sat 10/41:53 pmONT - BIL
2 stops7h 53mUnited Airlines
Deal found 6/10$259
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Fri 6/276:40 amBIL - ONT
1 stop8h 10mAmerican Airlines
Mon 6/3012:59 amONT - BIL
1 stop19h 34mAmerican Airlines
Deal found 6/12$673
This Hawaiian Airlines deal was found by Cheapflights users on 6/11. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/206:00 amBIL - ONT
1 stop5h 44mHawaiian Airlines
Sat 9/277:10 amONT - BIL
1 stop5h 14mHawaiian Airlines
Deal found 6/11$744

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 June 12, 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

Fri 10/3

5:45 am-9:06 am

1 stop4h 21m

Ontario

Mon 10/6

5:05 pm-10:32 pm

1 stop4h 27m

$241

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Wed 10/1

6:00 am-10:44 am

1 stop5h 44m

Ontario

Sat 10/4

6:00 am-3:04 pm

1 stop8h 04m

$253

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Wed 10/1

2:30 pm-8:24 pm

1 stop6h 54m

Ontario

Sat 10/4

1:53 pm-10:46 pm

2 stops7h 53m

$259

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Fri 6/27

6:40 am-1:50 pm

1 stop8h 10m

Ontario

Mon 6/30

12:59 am-9:33 pm

1 stop19h 34m

$673

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Sat 9/20

6:00 am-10:44 am

1 stop5h 44m

Ontario

Sat 9/27

7:10 am-1:24 pm

1 stop5h 14m

$744

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Mon 9/22

6:00 am-10:44 am

1 stop5h 44m

$120

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Thu 6/26

5:20 am-8:52 am

1 stop4h 32m

$151

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Sun 8/31

7:00 am-5:37 pm

2 stops11h 37m

$184

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Mon 9/22

3:43 pm-11:59 pm

2 stops9h 16m

$187

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Thu 6/26

6:40 am-4:13 pm

2 stops10h 33m

$424

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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 June 12, 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

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.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

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).

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 June 12, 2025.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 Delta. Our recent data shows that you can find tickets from as low as $241 on this airline. Additional options worth looking into are Alaska Airlines and United Airlines, starting at $253 and $259 round-trip. These flights start at 34% 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 $120. However, be on the lookout for offers from Delta and United Airlines, 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.

See more FAQs

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Alternative routes for Billings to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$82Average$303FlexibilityNo cancel feeOn-time75%
DeltaCheapest$266Average$368FlexibilityNo cancel feeOn-timeN/A

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