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 February 2026, 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.

$337 Cheap Flights from Ontario to Helena in 2026

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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.

7:08 pm - 5:45 pm

ONT

HLN

21h 37m

1 stop

6:22 pm - 11:59 pm

HLN

ONT

6h 37m

1 stop

$383Alaska Airlines

Mon, Mar 23 - Wed, Mar 25

10:33 am - 5:45 pm

ONT

HLN

6h 12m

1 stop

6:22 pm - 11:59 pm

HLN

ONT

6h 37m

1 stop

$384Alaska Airlines

Thu, Mar 26 - Sun, Mar 29

6:00 am - 5:45 pm

ONT

HLN

10h 45m

1 stop

6:22 pm - 9:39 am

HLN

ONT

16h 17m

1 stop

$398Alaska Airlines

Thu, Mar 26 - Sun, Mar 29

7:48 pm - 4:22 pm

ONT

HLN

19h 34m

1 stop

4:59 pm - 11:56 pm

HLN

ONT

7h 57m

1 stop

$471Alaska Airlines

Mon, Jun 29 - Thu, Jul 9

11:00 am - 4:22 pm

ONT

HLN

28h 22m

2 stops

4:59 pm - 11:56 pm

HLN

ONT

7h 57m

1 stop

$476Alaska Airlines

Mon, Jun 29 - Thu, Jul 9

7:48 pm - 4:22 pm

ONT

HLN

19h 34m

1 stop

4:59 pm - 11:56 pm

HLN

ONT

7h 57m

1 stop

$571Alaska Airlines

Thu, Jun 25 - Mon, Jun 29

7:48 pm - 4:22 pm

ONT

HLN

19h 34m

1 stop

4:59 pm - 11:56 pm

HLN

ONT

7h 57m

1 stop

$606Alaska Airlines

Fri, Jun 26 - Mon, Jun 29

7:00 am - 4:22 pm

ONT

HLN

8h 22m

2 stops

4:59 pm - 11:56 pm

HLN

ONT

7h 57m

1 stop

$620Alaska Airlines

Fri, Jun 26 - Mon, Jun 29

6:02 pm - 4:22 pm

ONT

HLN

21h 20m

2 stops

4:59 pm - 11:56 pm

HLN

ONT

7h 57m

1 stop

$636Alaska Airlines

Thu, Jun 25 - Mon, Jun 29

1:50 pm - 9:25 pm

ONT

HLN

6h 35m

1 stop

6:15 am - 12:48 pm

HLN

ONT

7h 33m

1 stop

$681United Airlines

Thu, Mar 5 - Sun, Mar 8

Alaska Airlines flights from Ontario to Helena

Our best Alaska Airlines deals on Ontario to Helena flight tickets

Alaska Airlines

Mar 23

ONT7:08 pmOntario

21h 37m

1 stop

HLN5:45 pmHelena

Mar 25

HLN6:22 pmHelena

6h 37m

1 stop

ONT11:59 pmOntario

$383

Alaska Airlines

Mar 26

ONT10:33 amOntario

6h 12m

1 stop

HLN5:45 pmHelena

Mar 29

HLN6:22 pmHelena

6h 37m

1 stop

ONT11:59 pmOntario

$384

Alaska Airlines

Mar 26

ONT6:00 amOntario

10h 45m

1 stop

HLN5:45 pmHelena

Mar 29

HLN6:22 pmHelena

16h 17m

1 stop

ONT9:39 amOntario

$398

United Airlines flights from Ontario to Helena

Our best United Airlines deals on Ontario to Helena flight tickets

United Airlines

Mar 5

ONT1:50 pmOntario

6h 35m

1 stop

HLN9:25 pmHelena

Mar 8

HLN6:15 amHelena

7h 33m

1 stop

ONT12:48 pmOntario

$681

United Airlines

Feb 28

ONT5:00 amOntario

7h 40m

1 stop

HLN1:40 pmHelena

Mar 4

HLN2:25 pmHelena

7h 25m

1 stop

ONT8:50 pmOntario

$687

United Airlines

Feb 28

ONT5:00 amOntario

7h 40m

1 stop

HLN1:40 pmHelena

Mar 4

HLN6:15 amHelena

7h 28m

1 stop

ONT12:43 pmOntario

$712

Fly from

Fly to

Route

Depart

Return

Price

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Mon 3/23

7:08 pm-5:45 pm

1 stop21h 37m

Helena

Wed 3/25

6:22 pm-11:59 pm

1 stop6h 37m

$383

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 3/26

10:33 am-5:45 pm

1 stop6h 12m

Helena

Sun 3/29

6:22 pm-11:59 pm

1 stop6h 37m

$384

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 3/26

6:00 am-5:45 pm

1 stop10h 45m

Helena

Sun 3/29

6:22 pm-9:39 am

1 stop16h 17m

$398

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Mon 6/29

7:48 pm-4:22 pm

1 stop19h 34m

Helena

Thu 7/9

4:59 pm-11:56 pm

1 stop7h 57m

$471

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Mon 6/29

11:00 am-4:22 pm

2 stops28h 22m

Helena

Thu 7/9

4:59 pm-11:56 pm

1 stop7h 57m

$476

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 6/25

7:48 pm-4:22 pm

1 stop19h 34m

Helena

Mon 6/29

4:59 pm-11:56 pm

1 stop7h 57m

$571

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 6/26

7:48 pm-4:22 pm

1 stop19h 34m

Helena

Mon 6/29

4:59 pm-11:56 pm

1 stop7h 57m

$606

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 6/26

7:00 am-4:22 pm

2 stops8h 22m

Helena

Mon 6/29

4:59 pm-11:56 pm

1 stop7h 57m

$620

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 6/25

6:02 pm-4:22 pm

2 stops21h 20m

Helena

Mon 6/29

4:59 pm-11:56 pm

1 stop7h 57m

$636

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 3/5

1:50 pm-9:25 pm

1 stop6h 35m

Helena

Sun 3/8

6:15 am-12:48 pm

1 stop7h 33m

$681

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 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

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

Alaska Airlines and United Airlines are the most popular carriers 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 51% 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 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

Fastest flight time	4h 29m
Direct flights	None

The fastest flight from Ontario to Helena takes 4h 29m

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 29m.
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 February 2026, 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 $184	Free Cancellation	Rating 7.9 8,236 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.