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

Alaska Airlines is the most popular carrier operating from Ontario to Helena

What airlines fly to Helena?

United Airlines, Delta and Alaska Airlines are the top three most popular airlines that fly to Helena from Ontario according to our data. United Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Helena. Keep in mind that there are 7 different airlines that fly to Helena on a routine basis, so you have a few additional options to choose from.

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

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

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

As of October 2025, there is 1 operator available to choose from for flights from Ontario Airport to Helena Airport.

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

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

The necessary travel and health documents for your Helena Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$178 Cheap Flights from Ontario to Helena in 2025/26

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Find the cheapest flights from Ontario to Helena

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 5:36 pmONT-HLN

10h 36m1 stop

6:13 pm - 3:17 pmHLN-ONT

22h 04m1 stop

$285Alaska Airlines

Find Deal

Thu, Nov 13 - Sun, Nov 16

6:00 am - 5:36 pmONT-HLN

10h 36m1 stop

6:13 pm - 11:05 amHLN-ONT

17h 52m1 stop

$293Alaska Airlines

Find Deal

Thu, Oct 30 - Mon, Nov 3

6:00 am - 5:36 pmONT-HLN

10h 36m1 stop

6:13 pm - 9:58 amHLN-ONT

40h 45m2 stops

$333Alaska Airlines

Find Deal

Thu, Nov 13 - Sun, Nov 16

6:11 pm - 5:36 pmONT-HLN

22h 25m1 stop

6:13 pm - 8:53 pmHLN-ONT

27h 40m1 stop

$354Alaska Airlines

Find Deal

Thu, Oct 30 - Sun, Nov 2

6:00 am - 5:36 pmONT-HLN

10h 36m1 stop

6:13 pm - 9:58 amHLN-ONT

40h 45m2 stops

$392Alaska Airlines

Find Deal

Thu, Oct 30 - Sun, Nov 2

4:36 pm - 5:55 pmONT-HLN

24h 19m1 stop

6:32 pm - 12:14 amHLN-ONT

6h 42m1 stop

$393Alaska Airlines

Find Deal

Wed, Dec 24 - Sun, Jan 4

7:20 am - 5:36 pmONT-HLN

9h 16m2 stops

6:13 pm - 11:32 pmHLN-ONT

6h 19m1 stop

$422Alaska Airlines

Find Deal

Thu, Oct 30 - Mon, Nov 3

6:00 am - 5:55 pmONT-HLN

10h 55m1 stop

6:32 pm - 6:25 pmHLN-ONT

24h 53m1 stop

$453Alaska Airlines

Find Deal

Sun, Dec 21 - Sun, Jan 4

5:10 pm - 10:30 pmONT-HLN

4h 20m1 stop

1:11 pm - 4:12 pmHLN-ONT

4h 01m1 stop

$517Delta

Find Deal

Tue, Dec 23 - Tue, Dec 30

1:29 pm - 9:22 pmONT-HLN

6h 53m1 stop

6:13 pm - 11:32 pmHLN-ONT

6h 19m1 stop

$606Multiple Airlines

Find Deal

Thu, Nov 13 - Sun, Nov 16

Alaska Airlines flights from Ontario to Helena

Our best Alaska Airlines deals on Ontario to Helena flight tickets

Alaska Airlines

Nov 13

ONT6:00 amOntario

10h 36m

1 stop

HLN5:36 pmHelena

Nov 16

HLN6:13 pmHelena

22h 04m

1 stop

ONT3:17 pmOntario

$285

Find similar

Alaska Airlines

Oct 30

ONT6:00 amOntario

10h 36m

1 stop

HLN5:36 pmHelena

Nov 3

HLN6:13 pmHelena

17h 52m

1 stop

ONT11:05 amOntario

$293

Find similar

Alaska Airlines

Nov 13

ONT6:00 amOntario

10h 36m

1 stop

HLN5:36 pmHelena

Nov 16

HLN6:13 pmHelena

40h 45m

2 stops

ONT9:58 amOntario

$333

Find similar

United Airlines flights from Ontario to Helena

Our best United Airlines deals on Ontario to Helena flight tickets

United Airlines

Oct 10

ONT5:05 amOntario

8h 04m

1 stop

HLN2:09 pmHelena

Oct 13

HLN6:30 amHelena

7h 21m

1 stop

ONT12:51 pmOntario

$707

Find similar

United Airlines

Oct 17

ONT5:05 amOntario

8h 04m

1 stop

HLN2:09 pmHelena

Oct 20

HLN5:18 pmHelena

19h 55m

2 stops

ONT12:13 pmOntario

$713

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 11/13

6:00 am-5:36 pm

1 stop10h 36m

Helena

Sun 11/16

6:13 pm-3:17 pm

1 stop22h 04m

$285

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 10/30

6:00 am-5:36 pm

1 stop10h 36m

Helena

Mon 11/3

6:13 pm-11:05 am

1 stop17h 52m

$293

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 11/13

6:00 am-5:36 pm

1 stop10h 36m

Helena

Sun 11/16

6:13 pm-9:58 am

2 stops40h 45m

$333

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 10/30

6:11 pm-5:36 pm

1 stop22h 25m

Helena

Sun 11/2

6:13 pm-8:53 pm

1 stop27h 40m

$354

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 10/30

6:00 am-5:36 pm

1 stop10h 36m

Helena

Sun 11/2

6:13 pm-9:58 am

2 stops40h 45m

$392

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Wed 12/24

4:36 pm-5:55 pm

1 stop24h 19m

Helena

Sun 1/4

6:32 pm-12:14 am

1 stop6h 42m

$393

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 10/30

7:20 am-5:36 pm

2 stops9h 16m

Helena

Mon 11/3

6:13 pm-11:32 pm

1 stop6h 19m

$422

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sun 12/21

6:00 am-5:55 pm

1 stop10h 55m

Helena

Sun 1/4

6:32 pm-6:25 pm

1 stop24h 53m

$453

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Tue 12/23

5:10 pm-10:30 pm

1 stop4h 20m

Helena

Tue 12/30

1:11 pm-4:12 pm

1 stop4h 01m

$517

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 11/13

1:29 pm-9:22 pm

1 stop6h 53m

Helena

Sun 11/16

6:13 pm-11:32 pm

1 stop6h 19m

$606

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Helena

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 Helena?

The cheapest day to depart from Ontario to Helena is on a Friday. Travelers who choose to depart for Helena on a Friday will often find tickets for as low as $431. The most expensive day to fly to Helena is Wednesday, with ticket prices averaging around $497.

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

According to our data, the cheapest time of day to fly to Helena is in the afternoon. momondo users have found flights departing from Ontario to Helena in the afternoon for as low as $393. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Helena is at noon when prices are around $611.

When to book flights from Ontario to Helena

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

Estimated round-trip price

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

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

Direct flights	None

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

Search flight deals

How far is Ontario to Helena by plane?
The straight-line distance from Ontario to Helena is 913.6 mi. In terms of flight time, this usually takes a little over 4h 20m.
When did momondo last update prices for flights from Ontario Airport to Helena Airport?
Prices for flights from Ontario Airport to Helena Airport were last updated today.
How many operators does momondo search for flights from Ontario Airport to Helena Airport?
As of October 2025, there is 1 operator available to choose from for flights from Ontario Airport to Helena Airport.
How old do you have to be to fly from Ontario Airport to Helena 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 Helena Airport.
What documentation or ID do you need to fly to Helena Airport?
The necessary travel and health documents for your Helena Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Ontario to Helena?
momondo data reveals that the most frequently booked airline on the route from Ontario to Helena is Delta, representing 100% of all bookings.

Best airlines flying from Ontario to Helena

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $205	Free Cancellation	Rating 7.9 7,969 reviews		Search Delta flights

Why use momondo?

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

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

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

Flights from Ontario to Helena 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 Helena?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Helena from Ontario.

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

Of course. momondo tracks the price of Ontario to Helena flights. All you need is a valid email address and we will do the rest; it is that quick and easy.