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 April 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.

$206 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.

6:00 am - 12:23 pm

ONT

HLN

5h 23m

1 stop

1:03 pm - 4:17 pm

HLN

ONT

4h 14m

1 stop

$330Delta

Sat, May 9 - Sat, May 16

6:00 am - 12:15 pm

ONT

HLN

5h 15m

1 stop

7:00 am - 12:08 pm

HLN

ONT

6h 08m

1 stop

$331Delta

Sat, Jul 11 - Sat, Jul 18

10:39 am - 5:45 pm

ONT

HLN

6h 06m

1 stop

6:22 pm - 11:59 pm

HLN

ONT

6h 37m

1 stop

$370Alaska Airlines

Fri, May 1 - Mon, May 4

7:59 pm - 5:45 pm

ONT

HLN

20h 46m

1 stop

6:22 pm - 2:32 pm

HLN

ONT

21h 10m

1 stop

$418Alaska Airlines

Fri, May 1 - Mon, May 4

10:39 am - 5:45 pm

ONT

HLN

6h 06m

1 stop

6:22 pm - 2:19 pm

HLN

ONT

20h 57m

2 stops

$421Alaska Airlines

Fri, May 1 - Mon, May 4

5:16 pm - 10:40 pm

ONT

HLN

4h 24m

1 stop

7:00 am - 12:08 pm

HLN

ONT

6h 08m

1 stop

$422Delta

Sat, Jul 11 - Sat, Jul 18

6:00 am - 12:23 pm

ONT

HLN

5h 23m

1 stop

1:03 pm - 10:34 pm

HLN

ONT

10h 31m

2 stops

$427Delta

Sat, May 9 - Sat, May 16

10:39 am - 5:45 pm

ONT

HLN

6h 06m

1 stop

6:22 pm - 11:59 pm

HLN

ONT

6h 37m

1 stop

$459Alaska Airlines

Fri, May 1 - Mon, May 4

7:59 pm - 5:45 pm

ONT

HLN

20h 46m

1 stop

6:22 pm - 2:19 pm

HLN

ONT

20h 57m

2 stops

$466Alaska Airlines

Fri, May 1 - Mon, May 4

6:00 am - 4:06 pm

ONT

HLN

9h 06m

1 stop

4:43 pm - 11:10 am

HLN

ONT

19h 27m

1 stop

$478Alaska Airlines

Wed, May 13 - Sun, May 17

Alaska Airlines flights from Ontario to Helena

Our best Alaska Airlines deals on Ontario to Helena flight tickets

Alaska Airlines

May 1

ONT10:39 amOntario

6h 06m

1 stop

HLN5:45 pmHelena

May 4

HLN6:22 pmHelena

6h 37m

1 stop

ONT11:59 pmOntario

$370

Alaska Airlines

May 1

ONT7:59 pmOntario

20h 46m

1 stop

HLN5:45 pmHelena

May 4

HLN6:22 pmHelena

21h 10m

1 stop

ONT2:32 pmOntario

$418

Alaska Airlines

May 1

ONT10:39 amOntario

6h 06m

1 stop

HLN5:45 pmHelena

May 4

HLN6:22 pmHelena

20h 57m

2 stops

ONT2:19 pmOntario

$421

Delta flights from Ontario to Helena

Our best Delta deals on Ontario to Helena flight tickets

Delta

May 9

ONT6:00 amOntario

5h 23m

1 stop

HLN12:23 pmHelena

May 16

HLN1:03 pmHelena

4h 14m

1 stop

ONT4:17 pmOntario

$330

Delta

Jul 11

ONT6:00 amOntario

5h 15m

1 stop

HLN12:15 pmHelena

Jul 18

HLN7:00 amHelena

6h 08m

1 stop

ONT12:08 pmOntario

$331

Delta

Jul 11

ONT5:16 pmOntario

4h 24m

1 stop

HLN10:40 pmHelena

Jul 18

HLN7:00 amHelena

6h 08m

1 stop

ONT12:08 pmOntario

$422

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sat 5/9

6:00 am-12:23 pm

1 stop5h 23m

Helena

Sat 5/16

1:03 pm-4:17 pm

1 stop4h 14m

$330

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sat 7/11

6:00 am-12:15 pm

1 stop5h 15m

Helena

Sat 7/18

7:00 am-12:08 pm

1 stop6h 08m

$331

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 5/1

10:39 am-5:45 pm

1 stop6h 06m

Helena

Mon 5/4

6:22 pm-11:59 pm

1 stop6h 37m

$370

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 5/1

7:59 pm-5:45 pm

1 stop20h 46m

Helena

Mon 5/4

6:22 pm-2:32 pm

1 stop21h 10m

$418

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 5/1

10:39 am-5:45 pm

1 stop6h 06m

Helena

Mon 5/4

6:22 pm-2:19 pm

2 stops20h 57m

$421

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sat 7/11

5:16 pm-10:40 pm

1 stop4h 24m

Helena

Sat 7/18

7:00 am-12:08 pm

1 stop6h 08m

$422

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sat 5/9

6:00 am-12:23 pm

1 stop5h 23m

Helena

Sat 5/16

1:03 pm-10:34 pm

2 stops10h 31m

$427

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 5/1

10:39 am-5:45 pm

1 stop6h 06m

Helena

Mon 5/4

6:22 pm-11:59 pm

1 stop6h 37m

$459

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 5/1

7:59 pm-5:45 pm

1 stop20h 46m

Helena

Mon 5/4

6:22 pm-2:19 pm

2 stops20h 57m

$466

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Wed 5/13

6:00 am-4:06 pm

1 stop9h 06m

Helena

Sun 5/17

4:43 pm-11:10 am

1 stop19h 27m

$478

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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?

United Airlines, Alaska Airlines, and Delta 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 54% 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 17m
Direct flights	None

The fastest flight from Ontario to Helena takes 4h 17m

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

Search flight deals

Frequently asked questions about flying from Ontario to Helena

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 17m.
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 April 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 8,406 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.