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$138+ Cheap flights from Ontario to Billings (ONT - BIL)

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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BIL
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
1 adult, Economy
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Cheap flight deals from Ontario to Billings

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Billings (BIL). 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 30, 2025.

Round-trip from

$241
(Delta)

One-way from

$138
(Trip.com)

Popular in

March

Cheapest in

October

Average price

$399
From Ontario to Billings Logan Intl
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One-way flight from Ontario to Billings Logan Intl
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Highest demand for flights based on searches. 21% potential increase in price ($108 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($24 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 Ontario to Billings

Cheapest flights from Ontario to Billings
Explore the most affordable flight options available from Ontario to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.

This Delta deal was found by Cheapflights users on 6/30. 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.
Tue 8/194:50 pmONT - BIL
1 stop4h 44mDelta
Fri 8/225:25 amBIL - ONT
1 stop4h 30mDelta
Deal found 6/30$241
This Alaska Airlines deal was found by Cheapflights users on 6/30. 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 9/67:10 amONT - BIL
1 stop5h 14mAlaska Airlines
Wed 9/106:00 amBIL - ONT
1 stop5h 44mAlaska Airlines
Deal found 6/30$253
This Hawaiian Airlines deal was found by Cheapflights users on 6/29. 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 10/116:00 amONT - BIL
1 stop8h 04mHawaiian Airlines
Sat 10/187:18 pmBIL - ONT
1 stop5h 41mHawaiian Airlines
Deal found 6/29$267
This United Airlines deal was found by Cheapflights users on 6/30. 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.
Sat 9/65:10 amONT - BIL
1 stop7h 07mUnited Airlines
Wed 9/107:00 amBIL - ONT
2 stops11h 37mUnited Airlines
Deal found 6/30$329
This American Airlines deal was found by Cheapflights users on 6/30. 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.
Tue 8/196:17 amONT - BIL
2 stops14h 13mAmerican Airlines
Fri 8/227:00 amBIL - ONT
1 stop7h 39mAmerican Airlines
Deal found 6/30$335
This United deal was found by Cheapflights users on 6/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/25:05 amONT - BIL
1 stop7h 12mMultiple Airlines
Fri 7/46:00 amBIL - ONT
1 stop8h 26mMultiple Airlines
Deal found 6/28$786

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Billings 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 30, 2025.
Use the filters below to find and compare flights from Ontario to Billings that are best for you.

Fly from

Ontario

Fly to

Billings

Route

Depart

Return

Price

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Tue 8/19

4:50 pm-10:34 pm

1 stop4h 44m

Billings Logan Intl

Fri 8/22

5:25 am-8:55 am

1 stop4h 30m

$241

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Sat 9/6

7:10 am-1:24 pm

1 stop5h 14m

Billings Logan Intl

Wed 9/10

6:00 am-10:44 am

1 stop5h 44m

$253

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Sat 10/11

6:00 am-3:04 pm

1 stop8h 04m

Billings Logan Intl

Sat 10/18

7:18 pm-11:59 pm

1 stop5h 41m

$267

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Sat 9/6

5:10 am-1:17 pm

1 stop7h 07m

Billings Logan Intl

Wed 9/10

7:00 am-5:37 pm

2 stops11h 37m

$329

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Tue 8/19

6:17 am-9:30 pm

2 stops14h 13m

Billings Logan Intl

Fri 8/22

7:00 am-1:39 pm

1 stop7h 39m

$335

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Fri 8/1

6:00 am-9:36 pm

1 stop14h 36m

$138

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Mon 7/7

4:00 pm-12:08 am

1 stop7h 08m

$225

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Mon 7/7

1:19 pm-10:47 pm

2 stops8h 28m

$241

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

Best time to book a flight from Ontario to Billings

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

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

Currently, February is the cheapest month in which you can book a flight from Ontario to Billings (average of $396). Flying from Ontario to Billings in June is currently the most expensive (average of $512). 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 ONT to BIL?

Find hourly flight availability from Ontario to Billings. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 30, 2025.

One of the essential ways to save on airfare from Ontario to Billings is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 31% on airfare.

How much does it cost to fly round-trip from Ontario to Billings?

Reviews of airlines servicing Billings

Get insights into the airlines that provide service to Billings. 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 Billings. Reviews last updated June 30, 2025.
Read through reviews of airlines operating flights from Ontario to Billings, such as Alaska Airlines, Delta, and Hawaiian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Crew

8.5

Boarding

8.1

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

Overall

8.0

Comfort

7.8

Entertainment

7.1

Crew

8.5

Boarding

8.1

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
7,973 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Crew

8.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,529 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Crew

8.5

Boarding

8.1

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
8,852 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Crew

8.5

Boarding

8.1

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

Overall

8.0

Comfort

7.8

Entertainment

7.1

Crew

8.5

Boarding

8.1

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 Ontario to Billings. 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 Ontario to Billings round-trip?

    Currently priced at $241, Delta will fly you from Ontario to Billings and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Alaska Airlines and Hawaiian Airlines - these airlines can fly you to your destination from $253 and $267, respectively. Delta is currently priced 38% below the average price you’ll pay for this route.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Ontario to Billings (average of $396). Flying from Ontario to Billings in June is currently the most expensive (average of $512). 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 3 airlines flying from Ontario to Billings

Discover the top 3 airlines that operate flights from Ontario to Billings. 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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$254Average$312FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$286Average$367FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$361Average$494FlexibilityNo cancel feeOn-time69%

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