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Cheap flights from Ontario to Billings from $130

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Billings departing on 1/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Billings

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
5:05 pm - 10:37 pmONT-BIL
4h 32m1 stop
Delta Logo
5:59 pm - 11:52 pmBIL-ONT
6h 53m1 stop
$286Delta
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Tue, Apr 7 - Wed, Apr 8
Alaska Airlines Logo
11:53 am - 1:22 pmONT-BIL
24h 29m2 stops
Alaska Airlines Logo
3:35 pm - 7:47 pmBIL-ONT
5h 12m1 stop
$288Alaska Airlines
Find Deal
Wed, Feb 4 - Wed, Feb 18
Delta Logo
11:55 am - 10:37 pmONT-BIL
9h 42m2 stops
Delta Logo
5:59 pm - 11:52 pmBIL-ONT
6h 53m1 stop
$291Delta
Find Deal
Tue, Apr 7 - Wed, Apr 8
Alaska Airlines Logo
4:03 pm - 2:55 pmONT-BIL
21h 52m1 stop
Alaska Airlines Logo
3:35 pm - 7:47 pmBIL-ONT
5h 12m1 stop
$302Alaska Airlines
Find Deal
Wed, Feb 4 - Wed, Feb 18
Alaska Airlines Logo
7:10 am - 1:22 pmONT-BIL
5h 12m1 stop
Alaska Airlines Logo
3:36 pm - 8:03 pmBIL-ONT
5h 27m1 stop
$304Alaska Airlines
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Wed, Dec 10 - Sat, Dec 13
Delta Logo
12:40 pm - 12:23 amONT-BIL
10h 43m2 stops
Delta Logo
6:22 pm - 9:55 pmBIL-ONT
4h 33m1 stop
$307Delta
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Wed, Dec 10 - Sat, Dec 13
United Airlines Logo
5:05 am - 1:23 pmONT-BIL
7h 18m1 stop
United Airlines Logo
4:15 pm - 8:42 pmBIL-ONT
5h 27m1 stop
$360United Airlines
Find Deal
Mon, Nov 24 - Tue, Dec 2
United Airlines Logo
5:05 am - 1:23 pmONT-BIL
7h 18m1 stop
United Airlines Logo
2:40 pm - 12:17 pmBIL-ONT
22h 37m2 stops
$438United Airlines
Find Deal
Mon, Nov 24 - Tue, Dec 2
American Airlines Logo
10:47 am - 9:18 pmONT-BIL
9h 31m1 stop
American Airlines Logo
6:00 am - 4:01 pmBIL-ONT
11h 01m2 stops
$556American Airlines
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Fri, Nov 14 - Sun, Nov 16
American Airlines Logo
9:59 am - 9:18 pmONT-BIL
10h 19m2 stops
American Airlines Logo
6:00 am - 4:01 pmBIL-ONT
11h 01m2 stops
$646American Airlines
Find Deal
Fri, Nov 14 - Sun, Nov 16

Alaska Airlines flights from Ontario to Billings

Our best Alaska Airlines deals on Ontario to Billings flight tickets
Alaska Airlines
Feb 4
ONT11:53 amOntario
24h 29m
2 stops
BIL1:22 pmBillings Logan Intl
Feb 18
BIL3:35 pmBillings Logan Intl
5h 12m
1 stop
ONT7:47 pmOntario
$288
Find similar
Alaska Airlines
Feb 4
ONT4:03 pmOntario
21h 52m
1 stop
BIL2:55 pmBillings Logan Intl
Feb 18
BIL3:35 pmBillings Logan Intl
5h 12m
1 stop
ONT7:47 pmOntario
$302
Find similar
Alaska Airlines
Dec 10
ONT7:10 amOntario
5h 12m
1 stop
BIL1:22 pmBillings Logan Intl
Dec 13
BIL3:36 pmBillings Logan Intl
5h 27m
1 stop
ONT8:03 pmOntario
$304
Find similar

United Airlines flights from Ontario to Billings

Our best United Airlines deals on Ontario to Billings flight tickets
United Airlines
Nov 24
ONT5:05 amOntario
7h 18m
1 stop
BIL1:23 pmBillings Logan Intl
Dec 2
BIL4:15 pmBillings Logan Intl
5h 27m
1 stop
ONT8:42 pmOntario
$360
Find similar
United Airlines
Nov 24
ONT5:05 amOntario
7h 18m
1 stop
BIL1:23 pmBillings Logan Intl
Dec 2
BIL2:40 pmBillings Logan Intl
22h 37m
2 stops
ONT12:17 pmOntario
$438
Find similar
United Airlines
Nov 15
ONT6:00 amOntario
10h 18m
2 stops
BIL5:18 pmBillings Logan Intl
Nov 22
BIL2:31 pmBillings Logan Intl
7h 13m
1 stop
ONT8:44 pmOntario
$536
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated November 4, 2025.
Use the filters below to find and compare flights from Ontario to Billings that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Tue 4/7

5:05 pm-10:37 pm

1 stop4h 32m

Billings Logan Intl

Wed 4/8

5:59 pm-11:52 pm

1 stop6h 53m

$286

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 2/4

11:53 am-1:22 pm

2 stops24h 29m

Billings Logan Intl

Wed 2/18

3:35 pm-7:47 pm

1 stop5h 12m

$288

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Tue 4/7

11:55 am-10:37 pm

2 stops9h 42m

Billings Logan Intl

Wed 4/8

5:59 pm-11:52 pm

1 stop6h 53m

$291

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 2/4

4:03 pm-2:55 pm

1 stop21h 52m

Billings Logan Intl

Wed 2/18

3:35 pm-7:47 pm

1 stop5h 12m

$302

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 12/10

7:10 am-1:22 pm

1 stop5h 12m

Billings Logan Intl

Sat 12/13

3:36 pm-8:03 pm

1 stop5h 27m

$304

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Wed 12/10

12:40 pm-12:23 am

2 stops10h 43m

Billings Logan Intl

Sat 12/13

6:22 pm-9:55 pm

1 stop4h 33m

$307

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Mon 11/24

5:05 am-1:23 pm

1 stop7h 18m

Billings Logan Intl

Tue 12/2

4:15 pm-8:42 pm

1 stop5h 27m

$360

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Mon 11/24

5:05 am-1:23 pm

1 stop7h 18m

Billings Logan Intl

Tue 12/2

2:40 pm-12:17 pm

2 stops22h 37m

$438

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Fri 11/14

10:47 am-9:18 pm

1 stop9h 31m

Billings Logan Intl

Sun 11/16

6:00 am-4:01 pm

2 stops11h 01m

$556

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Fri 11/14

9:59 am-9:18 pm

2 stops10h 19m

Billings Logan Intl

Sun 11/16

6:00 am-4:01 pm

2 stops11h 01m

$646

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Billings from

How to get the cheapest flight ticket from Ontario to Billings

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Billings?

Our data shows that Thursday is the least expensive day to fly to Billings. Tickets to fly out on this day can be as low as $114. Flights from Ontario to Billings on a Monday will generally be more expensive and average around $492. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Billings?

According to our data, the cheapest time of day to fly to Billings is in the morning. momondo users have found flights departing from Ontario to Billings in the morning for as low as $116. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the evening is when there is more demand to fly to Billings, so prices are often more expensive at around $396 per ticket.

When to book flights from Ontario to Billings

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Billings according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Billings (ONT to BIL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Billings

Direct flights

None
There are no direct flights from Ontario to Billings. There are no popular flight routes from Ontario to Billings.
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  • How far is Ontario to Billings Logan Intl by plane?

    The straight-line distance from Ontario to Billings Logan Intl is 941.7 mi. Typically, this will take 4h 32m by plane in normal conditions.

  • When did momondo last update prices for flights from Ontario Airport to Billings Logan Intl Airport?

    Prices for flights from Ontario Airport to Billings Logan Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario Airport to Billings Logan Intl Airport?

  • How old do you have to be to fly from Ontario Airport to Billings Logan Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Billings Logan Intl Airport.

  • What documentation or ID do you need to fly to Billings Logan Intl Airport?

    The required travel and health documents for your Billings Logan Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Billings Logan Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Ontario to Billings?

Best airlines flying from Ontario to Billings

Compare and see reviews for airlines that fly from Ontario to Billings with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $245Free CancellationRating
7.9
8,002 reviews
Search Delta flights
United AirlinesPriceFrom $270Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $284Free CancellationRating
8.0
11,237 reviews
Search Alaska Airlines flights

  • United Airlines Flights From Ontario to Billings

    United Airlines flight deals from Ontario to Billings start from $270 round-trip. Over the 4 United Airlines flights for this route in a normal week, average airfare is usually $507 round-trip - but some users have found much cheaper deals with momondo.

Traveling to a place near Billings?

Book flights to Billings if you plan to visit one of these locations
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Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Billings?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Billings. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ontario to Billings with flexible booking policies on momondo?

Flights from Ontario to Billings with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to Billings?

Once you have performed a search for Ontario to Billings flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Ontario to Billings right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Billings, momondo offers a useful price alert feature which will track prices for flights to Billings from Ontario and alert you when they change.

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