Which layover airport offers the lowest fares from Ontario to Billings?

Flights via Portland (PDX) offer the lowest average round-trip price of $269.

What is the cheapest airline that flies from Ontario to Billings Logan Intl?

Alaska Airlines, Delta, and United Airlines are the most popular carriers operating from Ontario to Billings Logan Intl

What airlines fly to Billings?

Delta, United Airlines and Alaska Airlines are the top three most popular airlines that fly to Billings from Ontario according to our data. Delta is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Billings. Keep in mind that there are 3 different airlines that fly to Billings on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from Ontario to Billings?

Portland (PDX) has the shortest average layover time for this route: 1h 13m.

Which layover airport has the shortest travel time from Ontario to Billings?

Flights connecting via Portland (PDX) have the shortest average one-way travel time: 5h 15m.

Which airport is the most popular layover for flights between Ontario and Billings?

Denver (DEN) was the most common stop: 75% of momondo users choosing 1-stop flights on this route connected there.

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?

As of August 2026, there are 3 operators available to choose from 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.

$186 Cheap Flights from Ontario to Billings in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Billings

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:13 am - 6:52 pmONT Ontario-BIL Billings Logan Intl

6h 39m1 stop Seattle/Tacoma Intl

5:12 pm - 11:06 pmBIL Billings Logan Intl-ONT Ontario

6h 54m1 stop Seattle/Tacoma Intl

$321Alaska Airlines

Thu, Oct 29 - Mon, Nov 2

2:13 pm - 11:50 pmONT Ontario-BIL Billings Logan Intl

8h 37m1 stop Seattle/Tacoma Intl

5:12 pm - 10:54 pmBIL Billings Logan Intl-ONT Ontario

6h 42m1 stop Seattle/Tacoma Intl

$321Alaska Airlines

Wed, Oct 28 - Wed, Nov 4

5:15 pm - 10:34 pmONT Ontario-BIL Billings Logan Intl

4h 19m1 stop Salt Lake City

5:20 am - 9:02 amBIL Billings Logan Intl-ONT Ontario

4h 42m1 stop Salt Lake City

$321Delta

Wed, Sep 9 - Wed, Sep 16

5:15 pm - 10:34 pmONT Ontario-BIL Billings Logan Intl

4h 19m1 stop Salt Lake City

5:20 am - 9:02 amBIL Billings Logan Intl-ONT Ontario

4h 42m1 stop Salt Lake City

$321Delta

Tue, Sep 8 - Wed, Sep 16

5:05 pm - 10:25 pmONT Ontario-BIL Billings Logan Intl

4h 20m1 stop Salt Lake City

6:33 pm - 10:04 pmBIL Billings Logan Intl-ONT Ontario

4h 31m1 stop Salt Lake City

$321Delta

Tue, Sep 1 - Wed, Sep 9

3:07 pm - 11:29 pmONT Ontario-BIL Billings Logan Intl

7h 22m1 stop Seattle/Tacoma Intl

7:20 pm - 11:04 amBIL Billings Logan Intl-ONT Ontario

16h 44m1 stop Seattle/Tacoma Intl

$346Alaska Airlines

Wed, Aug 26 - Mon, Aug 31

1:18 pm - 9:00 pmONT Ontario-BIL Billings Logan Intl

6h 42m1 stop Denver Intl

5:00 am - 12:12 pmBIL Billings Logan Intl-ONT Ontario

8h 12m2 stops Denver Intl San Francisco

$366United Airlines

Wed, Sep 9 - Wed, Sep 16

6:08 am - 3:24 pmONT Ontario-BIL Billings Logan Intl

8h 16m2 stops San Francisco Denver Intl

7:00 am - 12:50 pmBIL Billings Logan Intl-ONT Ontario

6h 50m1 stop Denver Intl

$371United Airlines

Thu, Aug 27 - Thu, Sep 3

2:27 pm - 10:47 pmONT Ontario-BIL Billings Logan Intl

7h 20m1 stop Dallas/Fort Worth

1:13 pm - 6:47 pmBIL Billings Logan Intl-ONT Ontario

6h 34m1 stop Dallas/Fort Worth

$421American Airlines

Wed, Aug 26 - Mon, Aug 31

2:27 pm - 10:47 pmONT Ontario-BIL Billings Logan Intl

7h 20m1 stop Dallas/Fort Worth

12:22 pm - 9:34 amBIL Billings Logan Intl-ONT Ontario

22h 12m2 stops Chicago O'Hare Intl Dallas/Fort Worth

$490American Airlines

Wed, Aug 26 - Mon, Aug 31

Cheap last minute flights

Enter your travel dates to find the best prices.

5:05 pm - 10:53 pmONT Ontario-BIL Billings Logan Intl

4h 48m1 stop Salt Lake City

5:20 am - 8:52 amBIL Billings Logan Intl-ONT Ontario

4h 32m1 stop Salt Lake City

$541Delta

Sat, Aug 15 - Sun, Aug 16

5:05 pm - 10:53 pmONT Ontario-BIL Billings Logan Intl

4h 48m1 stop Salt Lake City

5:20 am - 8:52 amBIL Billings Logan Intl-ONT Ontario

4h 32m1 stop Salt Lake City

$541Delta

Sat, Aug 15 - Mon, Aug 17

5:26 pm - 11:51 pmONT Ontario-BIL Billings Logan Intl

5h 25m1 stop Seattle/Tacoma Intl

6:14 am - 11:04 amBIL Billings Logan Intl-ONT Ontario

5h 50m1 stop Seattle/Tacoma Intl

$552Alaska Airlines

Tue, Aug 18 - Wed, Aug 19

5:05 pm - 10:25 pmONT Ontario-BIL Billings Logan Intl

4h 20m1 stop Salt Lake City

6:25 pm - 10:23 pmBIL Billings Logan Intl-ONT Ontario

4h 58m1 stop Salt Lake City

$580Delta

Fri, Aug 14 - Sat, Aug 15

5:05 pm - 10:25 pmONT Ontario-BIL Billings Logan Intl

4h 20m1 stop Salt Lake City

5:20 am - 8:52 amBIL Billings Logan Intl-ONT Ontario

4h 32m1 stop Salt Lake City

$581Delta

Fri, Aug 14 - Sun, Aug 16

2:05 pm - 11:51 pmONT Ontario-BIL Billings Logan Intl

8h 46m1 stop Seattle/Tacoma Intl

6:00 am - 11:11 amBIL Billings Logan Intl-ONT Ontario

6h 11m1 stop Seattle/Tacoma Intl

$639Alaska Airlines

Fri, Aug 14 - Sun, Aug 16

9:01 am - 9:00 pmONT Ontario-BIL Billings Logan Intl

10h 59m2 stops San Francisco Denver Intl

4:40 pm - 8:53 pmBIL Billings Logan Intl-ONT Ontario

5h 13m1 stop Denver Intl

$649United Airlines

Fri, Aug 14 - Sun, Aug 16

12:04 pm - 6:42 pmONT Ontario-BIL Billings Logan Intl

5h 38m1 stop Seattle/Tacoma Intl

6:14 am - 11:04 amBIL Billings Logan Intl-ONT Ontario

5h 50m1 stop Seattle/Tacoma Intl

$690Alaska Airlines

Fri, Aug 14 - Wed, Aug 19

1:18 pm - 9:00 pmONT Ontario-BIL Billings Logan Intl

6h 42m1 stop Denver Intl

4:40 pm - 8:53 pmBIL Billings Logan Intl-ONT Ontario

5h 13m1 stop Denver Intl

$755United Airlines

Fri, Aug 14 - Sun, Aug 16

9:01 am - 9:00 pmONT Ontario-BIL Billings Logan Intl

10h 59m2 stops San Francisco Denver Intl

5:07 am - 12:12 pmBIL Billings Logan Intl-ONT Ontario

8h 05m2 stops Denver Intl San Francisco

$805United Airlines

Fri, Aug 14 - Sun, Aug 16

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Delta flights from Ontario to Billings

Our best Delta deals on Ontario to Billings flight tickets

Delta

Sep 2

ONT5:05 pmOntario

4h 20m

1 stop

BIL10:25 pmBillings Logan Intl

Sep 9

BIL6:33 pmBillings Logan Intl

4h 31m

1 stop

ONT10:04 pmOntario

$350

Delta

Sep 19

ONT1:04 pmOntario

3h 44m

1 stop

BIL5:48 pmBillings Logan Intl

Oct 1

BIL5:20 amBillings Logan Intl

4h 42m

1 stop

ONT9:02 amOntario

$371

Delta

Sep 10

ONT5:15 pmOntario

4h 19m

1 stop

BIL10:34 pmBillings Logan Intl

Sep 16

BIL6:33 pmBillings Logan Intl

6h 14m

1 stop

ONT11:47 pmOntario

$386

United Airlines flights from Ontario to Billings

Our best United Airlines deals on Ontario to Billings flight tickets

United Airlines

Sep 9

ONT1:18 pmOntario

6h 42m

1 stop

BIL9:00 pmBillings Logan Intl

Sep 16

BIL5:00 amBillings Logan Intl

8h 12m

2 stops

ONT12:12 pmOntario

$366

United Airlines

Aug 27

ONT6:08 amOntario

8h 16m

2 stops

BIL3:24 pmBillings Logan Intl

Sep 3

BIL7:00 amBillings Logan Intl

6h 50m

1 stop

ONT12:50 pmOntario

$371

United Airlines

Nov 3

ONT9:25 amOntario

10h 49m

2 stops

BIL9:14 pmBillings Logan Intl

Nov 12

BIL5:00 amBillings Logan Intl

8h 29m

2 stops

ONT12:29 pmOntario

$411

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBillings

ONT Ontario - BIL Billings Logan Intl

ONTBIL

Ontario

Thu 10/29

11:13 am-6:52 pm

1 stop6h 39m

Billings Logan Intl

Mon 11/2

5:12 pm-11:06 pm

1 stop6h 54m

$321

OntarioBillings

ONT Ontario - BIL Billings Logan Intl

ONTBIL

Ontario

Wed 10/28

2:13 pm-11:50 pm

1 stop8h 37m

Billings Logan Intl

Wed 11/4

5:12 pm-10:54 pm

1 stop6h 42m

$321

OntarioBillings

ONT Ontario - BIL Billings Logan Intl

ONTBIL

Ontario

Wed 9/9

5:15 pm-10:34 pm

1 stop4h 19m

Billings Logan Intl

Wed 9/16

5:20 am-9:02 am

1 stop4h 42m

$321

OntarioBillings

ONT Ontario - BIL Billings Logan Intl

ONTBIL

Ontario

Tue 9/8

5:15 pm-10:34 pm

1 stop4h 19m

Billings Logan Intl

Wed 9/16

5:20 am-9:02 am

1 stop4h 42m

$321

Quickest round-trip

OntarioBillings

ONT Ontario - BIL Billings Logan Intl

ONTBIL

Ontario

Tue 9/1

5:05 pm-10:25 pm

1 stop4h 20m

Billings Logan Intl

Wed 9/9

6:33 pm-10:04 pm

1 stop4h 31m

$321

OntarioBillings

ONT Ontario - BIL Billings Logan Intl

ONTBIL

Ontario

Wed 8/26

3:07 pm-11:29 pm

1 stop7h 22m

Billings Logan Intl

Mon 8/31

7:20 pm-11:04 am

1 stop16h 44m

$346

OntarioBillings

ONT Ontario - BIL Billings Logan Intl

ONTBIL

Ontario

Wed 9/9

1:18 pm-9:00 pm

1 stop6h 42m

Billings Logan Intl

Wed 9/16

5:00 am-12:12 pm

2 stops8h 12m

$366

OntarioBillings

ONT Ontario - BIL Billings Logan Intl

ONTBIL

Ontario

Thu 8/27

6:08 am-3:24 pm

2 stops8h 16m

Billings Logan Intl

Thu 9/3

7:00 am-12:50 pm

1 stop6h 50m

$371

OntarioBillings

ONT Ontario - BIL Billings Logan Intl

ONTBIL

Ontario

Wed 8/26

2:27 pm-10:47 pm

1 stop7h 20m

Billings Logan Intl

Mon 8/31

1:13 pm-6:47 pm

1 stop6h 34m

$421

OntarioBillings

ONT Ontario - BIL Billings Logan Intl

ONTBIL

Ontario

Wed 8/26

2:27 pm-10:47 pm

1 stop7h 20m

Billings Logan Intl

Mon 8/31

12:22 pm-9:34 am

2 stops22h 12m

$490

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Ontario and Billings?

Prices are currently low for flights on this route.

Typical prices usually range from $360 to $573.
The lowest price recently found on this route was $321.

What is the cheapest month to fly to Billings?

The month of January is, on average, the cheapest month to fly to Billings from Ontario, with most prices found around $0. The month of February is another great option to travel to Billings, with average flight prices from Ontario averaging around $340.

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

Fastest flight time	4h 19m
Direct flights	None

The fastest flight from Ontario to Billings takes 4h 19m

There are no direct flights from Ontario to Billings. There are no popular flight routes from Ontario to Billings.

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Frequently asked questions about flying from Ontario to Billings

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 19m 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?
As of August 2026, there are 3 operators available to choose from 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?
momondo data reveals that the most frequently booked airline on the route from Ontario to Billings is Delta, representing 64% of all bookings. The subsequent popular airlines are Alaska Airlines at 20% and United Airlines at 16%.

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
Alaska Airlines	PriceFrom $269	Free Cancellation	Rating 7.9 12,808 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $270	Free Cancellation	Rating 7.4 10,112 reviews	Search United Airlines flights
Delta	PriceFrom $284	Free Cancellation	Rating 7.8 8,503 reviews	Search Delta flights

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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.