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

United Airlines and Alaska 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 39% 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 August 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.

$165 Cheap Flights from Ontario to Helena in 2025

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Find the cheapest flights from Ontario to Helena

Round-trip

One-way

Last minute

Cheap round-trip flights

6:38 pm - 4:04 pmONT-HLN

20h 26m1 stop

2:44 pm - 8:24 pmHLN-ONT

6h 40m1 stop

$510United Airlines

Find Deal

Fri, Sep 5 - Tue, Sep 30

1:15 pm - 9:11 pmONT-HLN

6h 56m1 stop

5:20 pm - 5:29 pmHLN-ONT

25h 09m1 stop

$556United Airlines

Find Deal

Wed, Sep 10 - Sun, Sep 14

4:50 pm - 10:13 pmONT-HLN

4h 23m1 stop

5:50 am - 8:55 amHLN-ONT

4h 05m1 stop

$593Delta

Find Deal

Thu, Sep 4 - Sun, Sep 7

7:18 pm - 5:55 pmONT-HLN

21h 37m1 stop

6:32 pm - 11:59 pmHLN-ONT

30h 27m2 stops

$662Alaska Airlines

Find Deal

Wed, Dec 24 - Mon, Dec 29

10:44 am - 5:55 pmONT-HLN

6h 11m1 stop

6:32 pm - 6:24 pmHLN-ONT

24h 52m1 stop

$674Alaska Airlines

Find Deal

Wed, Dec 24 - Mon, Dec 29

5:10 am - 4:04 pmONT-HLN

9h 54m1 stop

5:20 pm - 12:32 pmHLN-ONT

20h 12m1 stop

$675United Airlines

Find Deal

Thu, Sep 4 - Mon, Sep 8

6:00 am - 10:13 pmONT-HLN

15h 13m2 stops

5:50 am - 8:55 amHLN-ONT

4h 05m1 stop

$758Delta

Find Deal

Thu, Sep 4 - Sun, Sep 7

5:00 am - 6:52 pmONT-HLN

12h 52m1 stop

7:32 pm - 9:55 amHLN-ONT

15h 23m1 stop

$814Alaska Airlines

Find Deal

Wed, Nov 26 - Sun, Nov 30

4:50 pm - 10:13 pmONT-HLN

4h 23m1 stop

5:50 am - 8:55 amHLN-ONT

4h 05m1 stop

$972Delta

Find Deal

Thu, Sep 4 - Sun, Sep 7

6:00 am - 12:26 pmONT-HLN

5h 26m1 stop

1:06 pm - 10:55 pmHLN-ONT

10h 49m2 stops

$1,400Delta

Find Deal

Wed, Nov 26 - Sun, Nov 30

United Airlines flights from Ontario to Helena

Our best United Airlines deals on Ontario to Helena flight tickets

United Airlines

Sep 5

ONT6:38 pmOntario

20h 26m

1 stop

HLN4:04 pmHelena

Sep 30

HLN2:44 pmHelena

6h 40m

1 stop

ONT8:24 pmOntario

$510

Find similar

United Airlines

Sep 10

ONT1:15 pmOntario

6h 56m

1 stop

HLN9:11 pmHelena

Sep 14

HLN5:20 pmHelena

25h 09m

1 stop

ONT5:29 pmOntario

$556

Find similar

United Airlines

Sep 3

ONT1:15 pmOntario

6h 56m

1 stop

HLN9:11 pmHelena

Sep 8

HLN5:20 pmHelena

20h 12m

1 stop

ONT12:32 pmOntario

$581

Find similar

Delta flights from Ontario to Helena

Our best Delta deals on Ontario to Helena flight tickets

Delta

Sep 4

ONT4:50 pmOntario

4h 23m

1 stop

HLN10:13 pmHelena

Sep 7

HLN5:50 amHelena

4h 05m

1 stop

ONT8:55 amOntario

$593

Find similar

Delta

Sep 4

ONT6:00 amOntario

15h 13m

2 stops

HLN10:13 pmHelena

Sep 7

HLN5:50 amHelena

4h 05m

1 stop

ONT8:55 amOntario

$758

Find similar

Delta

Sep 4

ONT4:50 pmOntario

4h 23m

1 stop

HLN10:13 pmHelena

Sep 7

HLN5:50 amHelena

4h 05m

1 stop

ONT8:55 amOntario

$972

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 9/5

6:38 pm-4:04 pm

1 stop20h 26m

Helena

Tue 9/30

2:44 pm-8:24 pm

1 stop6h 40m

$510

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Wed 9/10

1:15 pm-9:11 pm

1 stop6h 56m

Helena

Sun 9/14

5:20 pm-5:29 pm

1 stop25h 09m

$556

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 9/4

4:50 pm-10:13 pm

1 stop4h 23m

Helena

Sun 9/7

5:50 am-8:55 am

1 stop4h 05m

$593

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Wed 12/24

7:18 pm-5:55 pm

1 stop21h 37m

Helena

Mon 12/29

6:32 pm-11:59 pm

2 stops30h 27m

$662

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Wed 12/24

10:44 am-5:55 pm

1 stop6h 11m

Helena

Mon 12/29

6:32 pm-6:24 pm

1 stop24h 52m

$674

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 9/4

5:10 am-4:04 pm

1 stop9h 54m

Helena

Mon 9/8

5:20 pm-12:32 pm

1 stop20h 12m

$675

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 9/4

6:00 am-10:13 pm

2 stops15h 13m

Helena

Sun 9/7

5:50 am-8:55 am

1 stop4h 05m

$758

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Wed 11/26

5:00 am-6:52 pm

1 stop12h 52m

Helena

Sun 11/30

7:32 pm-9:55 am

1 stop15h 23m

$814

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 9/4

4:50 pm-10:13 pm

1 stop4h 23m

Helena

Sun 9/7

5:50 am-8:55 am

1 stop4h 05m

$972

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Wed 11/26

6:00 am-12:26 pm

1 stop5h 26m

Helena

Sun 11/30

1:06 pm-10:55 pm

2 stops10h 49m

$1,400

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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 23m.
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 August 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 7,981 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.