What airlines fly to Ontario?

Delta, United Airlines and Alaska Airlines are the top three most popular airlines that fly to Ontario from Helena according to our data. Delta is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 6 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Helena Airport to Ontario Airport?

Prices for flights from Helena Airport to Ontario Airport were last updated today.

How many operators does momondo search for flights from Helena Airport to Ontario Airport?

There is 1 operator available for flights from Helena Airport to Ontario Airport as of October 2025.

How old do you have to be to fly from Helena Airport to Ontario Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Helena Airport to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The required travel and health documents for your Ontario 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 Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$263 Cheap Flights from Helena to Ontario in 2025/26

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Find the cheapest flights from Helena to Los Angeles

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Cheap round-trip flights

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6:28 pm - 11:19 amHLN-ONT

17h 51m1 stop

6:00 am - 5:51 pmONT-HLN

10h 51m1 stop

$263Hawaiian Airlines

Find Deal

Sat, Dec 6 - Sat, Dec 13

6:28 pm - 11:19 amHLN-ONT

17h 51m1 stop

7:10 am - 5:51 pmONT-HLN

9h 41m2 stops

$302Alaska Airlines

Find Deal

Sat, Dec 6 - Sat, Dec 13

1:06 pm - 10:47 pmHLN-ONT

10h 41m2 stops

12:40 pm - 12:25 pmONT-HLN

22h 45m2 stops

$304Delta

Find Deal

Sat, Dec 6 - Sat, Dec 13

1:06 pm - 10:47 pmHLN-ONT

10h 41m2 stops

6:00 am - 12:25 pmONT-HLN

5h 25m1 stop

$325Delta

Find Deal

Sat, Dec 6 - Sat, Dec 13

6:28 pm - 11:19 amHLN-ONT

17h 51m1 stop

6:00 am - 5:51 pmONT-HLN

10h 51m1 stop

$344Alaska Airlines

Find Deal

Sat, Dec 6 - Sat, Dec 13

6:28 pm - 11:19 amHLN-ONT

17h 51m1 stop

11:53 am - 5:22 pmONT-HLN

28h 29m1 stop

$354Alaska Airlines

Find Deal

Fri, Dec 12 - Sun, Jan 11

6:40 am - 12:33 pmHLN-ONT

6h 53m1 stop

5:05 am - 1:27 pmONT-HLN

7h 22m1 stop

$377United Airlines

Find Deal

Thu, Nov 20 - Mon, Nov 24

6:13 pm - 11:05 amHLN-ONT

17h 52m1 stop

5:00 am - 6:52 pmONT-HLN

12h 52m1 stop

$403Alaska Airlines

Find Deal

Wed, Nov 19 - Wed, Nov 26

1:06 pm - 10:47 pmHLN-ONT

10h 41m2 stops

12:40 pm - 10:30 pmONT-HLN

8h 50m2 stops

$413Delta

Find Deal

Sat, Dec 6 - Sat, Dec 13

2:22 pm - 8:44 pmHLN-ONT

7h 22m1 stop

5:05 am - 1:27 pmONT-HLN

7h 22m1 stop

$449United Airlines

Find Deal

Wed, Nov 19 - Sun, Nov 23

Alaska Airlines flights from Helena to Ontario

Our best Alaska Airlines deals on Helena to Ontario flight tickets

Alaska Airlines

Dec 6

HLN6:28 pmHelena

17h 51m

1 stop

ONT11:19 amOntario

Dec 13

ONT7:10 amOntario

9h 41m

2 stops

HLN5:51 pmHelena

$302

Find similar

Alaska Airlines

Dec 6

HLN6:28 pmHelena

17h 51m

1 stop

ONT11:19 amOntario

Dec 13

ONT6:00 amOntario

10h 51m

1 stop

HLN5:51 pmHelena

$344

Find similar

Alaska Airlines

Dec 12

HLN6:28 pmHelena

17h 51m

1 stop

ONT11:19 amOntario

Jan 11

ONT11:53 amOntario

28h 29m

1 stop

HLN5:22 pmHelena

$354

Find similar

United Airlines flights from Helena to Ontario

Our best United Airlines deals on Helena to Ontario flight tickets

United Airlines

Nov 20

HLN6:40 amHelena

6h 53m

1 stop

ONT12:33 pmOntario

Nov 24

ONT5:05 amOntario

7h 22m

1 stop

HLN1:27 pmHelena

$377

Find similar

United Airlines

Nov 19

HLN2:22 pmHelena

7h 22m

1 stop

ONT8:44 pmOntario

Nov 23

ONT5:05 amOntario

7h 22m

1 stop

HLN1:27 pmHelena

$449

Find similar

United Airlines

Nov 20

HLN2:22 pmHelena

23h 15m

2 stops

ONT12:37 pmOntario

Nov 24

ONT5:05 amOntario

7h 22m

1 stop

HLN1:27 pmHelena

$564

Find similar

Fly from

Fly to

Route

Depart

Return

Price

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 12/6

6:28 pm-11:19 am

1 stop17h 51m

Ontario

Sat 12/13

6:00 am-5:51 pm

1 stop10h 51m

$263

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 12/6

6:28 pm-11:19 am

1 stop17h 51m

Ontario

Sat 12/13

7:10 am-5:51 pm

2 stops9h 41m

$302

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 12/6

1:06 pm-10:47 pm

2 stops10h 41m

Ontario

Sat 12/13

12:40 pm-12:25 pm

2 stops22h 45m

$304

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 12/6

1:06 pm-10:47 pm

2 stops10h 41m

Ontario

Sat 12/13

6:00 am-12:25 pm

1 stop5h 25m

$325

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 12/6

6:28 pm-11:19 am

1 stop17h 51m

Ontario

Sat 12/13

6:00 am-5:51 pm

1 stop10h 51m

$344

HelenaOntario

HLN - ONT

HLNONT

Helena

Fri 12/12

6:28 pm-11:19 am

1 stop17h 51m

Ontario

Sun 1/11

11:53 am-5:22 pm

1 stop28h 29m

$354

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 11/20

6:40 am-12:33 pm

1 stop6h 53m

Ontario

Mon 11/24

5:05 am-1:27 pm

1 stop7h 22m

$377

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 11/19

6:13 pm-11:05 am

1 stop17h 52m

Ontario

Wed 11/26

5:00 am-6:52 pm

1 stop12h 52m

$403

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 12/6

1:06 pm-10:47 pm

2 stops10h 41m

Ontario

Sat 12/13

12:40 pm-10:30 pm

2 stops8h 50m

$413

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 11/19

2:22 pm-8:44 pm

1 stop7h 22m

Ontario

Sun 11/23

5:05 am-1:27 pm

1 stop7h 22m

$449

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Helena to Ontario

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

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

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $488. This is often the case because there is less demand to fly during this day of the week. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Helena to Ontario for around $517.

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

At noon is the cheapest time of day to fly from Helena to Ontario when you can find flight prices for as low as $423. Flying to Ontario at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $726 on average. Flights to Ontario from Helena in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Helena to Ontario

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

Estimated round-trip price

Cheap Helena to Ontario (HLN to ONT) flight deals and tips

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

Direct flights	None

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

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How far is Helena to Ontario by plane?
The straight-line distance from Helena to Ontario is 913.6 mi. Flights usually cover this in 3h 53m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Helena Airport to Ontario Airport?
Prices for flights from Helena Airport to Ontario Airport were last updated today.
How many operators does momondo search for flights from Helena Airport to Ontario Airport?
There is 1 operator available for flights from Helena Airport to Ontario Airport as of October 2025.
How old do you have to be to fly from Helena Airport to Ontario Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Helena Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The required travel and health documents for your Ontario 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 Ontario 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 Helena to Ontario?
Based on momondo bookings for flights between Helena and Ontario, the leading airline is Delta, making up 100% of the total bookings.

Best airlines flying from Helena to Ontario

Compare and see reviews for airlines that fly from Helena to Ontario with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $294	Free Cancellation	Rating 7.9 7,982 reviews		Search Delta flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Helena to Ontario for you.

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

All flight searches from Helena to Ontario on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Helena to Ontario.

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

Yes. momondo can track prices for Helena to Ontario flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.