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 38% 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.

What is the cheapest airline that flies from Helena to Ontario?

Delta, United Airlines, and Alaska Airlines are the most popular carriers operating from Helena to Ontario

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 December 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.

$293 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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4:36 pm - 10:44 pm

HLN

ONT

7h 08m1 stop

6:14 am - 3:59 pm

ONT

HLN

8h 45m1 stop

$293Alaska Airlines

Wed, Feb 25 - Sat, Feb 28

6:32 pm - 12:14 am

HLN

ONT

6h 42m1 stop

4:03 pm - 6:11 pm

ONT

HLN

25h 08m1 stop

$294Alaska Airlines

Mon, Jan 5 - Mon, Jan 12

4:36 pm - 10:44 pm

HLN

ONT

7h 08m1 stop

6:14 am - 3:59 pm

ONT

HLN

8h 45m1 stop

$303Alaska Airlines

Wed, Feb 25 - Sat, Feb 28

4:36 pm - 10:44 pm

HLN

ONT

7h 08m1 stop

7:00 am - 3:59 pm

ONT

HLN

31h 59m2 stops

$333Alaska Airlines

Wed, Feb 25 - Sat, Feb 28

6:32 pm - 12:08 pm

HLN

ONT

18h 36m2 stops

4:03 pm - 6:11 pm

ONT

HLN

25h 08m1 stop

$343Alaska Airlines

Mon, Jan 5 - Mon, Jan 12

4:36 pm - 6:57 pm

HLN

ONT

27h 21m2 stops

7:00 am - 3:59 pm

ONT

HLN

7h 59m2 stops

$390Alaska Airlines

Wed, Feb 25 - Sat, Feb 28

4:36 pm - 6:57 pm

HLN

ONT

27h 21m2 stops

7:00 am - 3:59 pm

ONT

HLN

7h 59m2 stops

$404Alaska Airlines

Wed, Feb 25 - Sat, Feb 28

4:36 pm - 6:57 pm

HLN

ONT

27h 21m2 stops

7:00 am - 3:59 pm

ONT

HLN

31h 59m2 stops

$411Alaska Airlines

Wed, Feb 25 - Sat, Feb 28

12:59 pm - 4:29 pm

HLN

ONT

4h 30m1 stop

6:00 am - 12:19 pm

ONT

HLN

5h 19m1 stop

$584Delta

Sat, Mar 28 - Sun, Apr 12

4:10 pm - 10:38 pm

HLN

ONT

7h 28m1 stop

1:30 pm - 3:38 pm

ONT

HLN

49h 08m2 stops

$628Alaska Airlines

Sat, Mar 28 - Sun, Apr 12

Alaska Airlines flights from Helena to Ontario

Our best Alaska Airlines deals on Helena to Ontario flight tickets

Alaska Airlines

Feb 25

HLN4:36 pmHelena

7h 08m

1 stop

ONT10:44 pmOntario

Feb 28

ONT6:14 amOntario

8h 45m

1 stop

HLN3:59 pmHelena

$293

Find similar

Alaska Airlines

Jan 5

HLN6:32 pmHelena

6h 42m

1 stop

ONT12:14 amOntario

Jan 12

ONT4:03 pmOntario

25h 08m

1 stop

HLN6:11 pmHelena

$294

Find similar

Alaska Airlines

Feb 25

HLN4:36 pmHelena

7h 08m

1 stop

ONT10:44 pmOntario

Feb 28

ONT6:14 amOntario

8h 45m

1 stop

HLN3:59 pmHelena

$303

Find similar

United Airlines flights from Helena to Ontario

Our best United Airlines deals on Helena to Ontario flight tickets

United Airlines

Dec 17

HLN6:30 amHelena

7h 02m

1 stop

ONT12:32 pmOntario

Jan 6

ONT5:05 amOntario

7h 36m

1 stop

HLN1:41 pmHelena

$488

Find similar

United Airlines

Dec 17

HLN2:30 pmHelena

7h 12m

1 stop

ONT8:42 pmOntario

Jan 6

ONT1:53 pmOntario

22h 48m

2 stops

HLN1:41 pmHelena

$579

Find similar

United Airlines

Dec 17

HLN2:30 pmHelena

7h 12m

1 stop

ONT8:42 pmOntario

Jan 5

ONT6:39 pmOntario

18h 02m

2 stops

HLN1:41 pmHelena

$668

Find similar

Fly from

Fly to

Route

Depart

Return

Price

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 2/25

4:36 pm-10:44 pm

1 stop7h 08m

Ontario

Sat 2/28

6:14 am-3:59 pm

1 stop8h 45m

$293

HelenaOntario

HLN - ONT

HLNONT

Helena

Mon 1/5

6:32 pm-12:14 am

1 stop6h 42m

Ontario

Mon 1/12

4:03 pm-6:11 pm

1 stop25h 08m

$294

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 2/25

4:36 pm-10:44 pm

1 stop7h 08m

Ontario

Sat 2/28

6:14 am-3:59 pm

1 stop8h 45m

$303

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 2/25

4:36 pm-10:44 pm

1 stop7h 08m

Ontario

Sat 2/28

7:00 am-3:59 pm

2 stops31h 59m

$333

HelenaOntario

HLN - ONT

HLNONT

Helena

Mon 1/5

6:32 pm-12:08 pm

2 stops18h 36m

Ontario

Mon 1/12

4:03 pm-6:11 pm

1 stop25h 08m

$343

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 2/25

4:36 pm-6:57 pm

2 stops27h 21m

Ontario

Sat 2/28

7:00 am-3:59 pm

2 stops7h 59m

$390

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 2/25

4:36 pm-6:57 pm

2 stops27h 21m

Ontario

Sat 2/28

7:00 am-3:59 pm

2 stops7h 59m

$404

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 2/25

4:36 pm-6:57 pm

2 stops27h 21m

Ontario

Sat 2/28

7:00 am-3:59 pm

2 stops31h 59m

$411

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 3/28

12:59 pm-4:29 pm

1 stop4h 30m

Ontario

Sun 4/12

6:00 am-12:19 pm

1 stop5h 19m

$584

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 3/28

4:10 pm-10:38 pm

1 stop7h 28m

Ontario

Sun 4/12

1:30 pm-3:38 pm

2 stops49h 08m

$628

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted 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

Fastest flight time	4h 30m
Direct flights	None

The fastest flight from Helena to Ontario takes 4h 30m

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

Search flight deals

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 4h 30m, 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 December 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 8,007 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.