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 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 2026

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.

7:00 am - 4:23 pmONT Ontario-HLN Helena

8h 23m1 stop Seattle/Tacoma Intl

5:00 pm - 10:41 pmHLN Helena-ONT Ontario

6h 41m1 stop Seattle/Tacoma Intl

$329Alaska Airlines

Sat, Jan 30 - Wed, Feb 3

6:00 am - 12:17 pmONT Ontario-HLN Helena

5h 17m1 stop Salt Lake City

12:57 pm - 10:40 pmHLN Helena-ONT Ontario

10h 43m2 stops Salt Lake City Seattle/Tacoma Intl

$384Delta

Tue, Sep 15 - Sat, Sep 19

5:15 pm - 10:24 pmONT Ontario-HLN Helena

4h 09m1 stop Salt Lake City

12:57 pm - 10:40 pmHLN Helena-ONT Ontario

10h 43m2 stops Salt Lake City Seattle/Tacoma Intl

$385Delta

Mon, Sep 28 - Tue, Sep 29

5:57 pm - 4:23 pmONT Ontario-HLN Helena

21h 26m2 stops Portland Seattle/Tacoma Intl

5:00 pm - 10:41 pmHLN Helena-ONT Ontario

6h 41m1 stop Seattle/Tacoma Intl

$406Alaska Airlines

Sat, Jan 30 - Wed, Feb 3

7:10 am - 4:23 pmONT Ontario-HLN Helena

8h 13m2 stops Portland Seattle/Tacoma Intl

5:00 pm - 10:41 pmHLN Helena-ONT Ontario

6h 41m1 stop Seattle/Tacoma Intl

$416Alaska Airlines

Sat, Jan 30 - Wed, Feb 3

5:15 pm - 10:24 pmONT Ontario-HLN Helena

4h 09m1 stop Salt Lake City

12:57 pm - 4:35 pmHLN Helena-ONT Ontario

4h 38m1 stop Salt Lake City

$434Delta

Tue, Sep 15 - Sat, Sep 19

6:00 am - 12:17 pmONT Ontario-HLN Helena

5h 17m1 stop Salt Lake City

7:15 am - 12:14 pmHLN Helena-ONT Ontario

5h 59m1 stop Salt Lake City

$444Delta

Mon, Sep 28 - Tue, Sep 29

7:10 am - 4:23 pmONT Ontario-HLN Helena

8h 13m2 stops Portland Seattle/Tacoma Intl

5:00 pm - 5:22 pmHLN Helena-ONT Ontario

25h 22m2 stops Seattle/Tacoma Intl Boise Air Term. Gowen Fld

$503Alaska Airlines

Sat, Jan 30 - Wed, Feb 3

5:57 pm - 4:23 pmONT Ontario-HLN Helena

21h 26m2 stops Portland Seattle/Tacoma Intl

5:00 pm - 5:22 pmHLN Helena-ONT Ontario

25h 22m2 stops Seattle/Tacoma Intl Boise Air Term. Gowen Fld

$510Alaska Airlines

Sat, Jan 30 - Wed, Feb 3

7:10 am - 4:23 pmONT Ontario-HLN Helena

8h 13m2 stops Portland Seattle/Tacoma Intl

5:00 pm - 5:22 pmHLN Helena-ONT Ontario

25h 22m2 stops Seattle/Tacoma Intl Boise Air Term. Gowen Fld

$514Alaska Airlines

Sat, Jan 30 - Wed, Feb 3

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Alaska Airlines flights from Ontario to Helena

Our best Alaska Airlines deals on Ontario to Helena flight tickets

Alaska Airlines

Jan 30

ONT7:00 amOntario

8h 23m

1 stop

HLN4:23 pmHelena

Feb 3

HLN5:00 pmHelena

6h 41m

1 stop

ONT10:41 pmOntario

$329

Alaska Airlines

Jan 30

ONT5:57 pmOntario

21h 26m

2 stops

HLN4:23 pmHelena

Feb 3

HLN5:00 pmHelena

6h 41m

1 stop

ONT10:41 pmOntario

$406

Alaska Airlines

Jan 30

ONT7:00 amOntario

8h 23m

1 stop

HLN4:23 pmHelena

Feb 3

HLN5:00 pmHelena

25h 22m

2 stops

ONT5:22 pmOntario

$416

United Airlines flights from Ontario to Helena

Our best United Airlines deals on Ontario to Helena flight tickets

United Airlines

Sep 27

ONT1:24 pmOntario

6h 54m

1 stop

HLN9:18 pmHelena

Sep 29

HLN6:25 amHelena

7h 21m

1 stop

ONT12:46 pmOntario

$564

United Airlines

Sep 15

ONT5:00 amOntario

7h 45m

1 stop

HLN1:45 pmHelena

Sep 19

HLN2:26 pmHelena

7h 27m

1 stop

ONT8:53 pmOntario

$634

United Airlines

Sep 23

ONT5:00 amOntario

7h 45m

1 stop

HLN1:45 pmHelena

Sep 25

HLN6:25 amHelena

7h 21m

1 stop

ONT12:46 pmOntario

$668

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioHelena

ONT Ontario - HLN Helena

ONTHLN

Ontario

Sat 1/30

7:00 am-4:23 pm

1 stop8h 23m

Helena

Wed 2/3

5:00 pm-10:41 pm

1 stop6h 41m

$329

OntarioHelena

ONT Ontario - HLN Helena

ONTHLN

Ontario

Tue 9/15

6:00 am-12:17 pm

1 stop5h 17m

Helena

Sat 9/19

12:57 pm-10:40 pm

2 stops10h 43m

$384

OntarioHelena

ONT Ontario - HLN Helena

ONTHLN

Ontario

Mon 9/28

5:15 pm-10:24 pm

1 stop4h 09m

Helena

Tue 9/29

12:57 pm-10:40 pm

2 stops10h 43m

$385

OntarioHelena

ONT Ontario - HLN Helena

ONTHLN

Ontario

Sat 1/30

5:57 pm-4:23 pm

2 stops21h 26m

Helena

Wed 2/3

5:00 pm-10:41 pm

1 stop6h 41m

$406

OntarioHelena

ONT Ontario - HLN Helena

ONTHLN

Ontario

Sat 1/30

7:10 am-4:23 pm

2 stops8h 13m

Helena

Wed 2/3

5:00 pm-10:41 pm

1 stop6h 41m

$416

Quickest round-trip

OntarioHelena

ONT Ontario - HLN Helena

ONTHLN

Ontario

Tue 9/15

5:15 pm-10:24 pm

1 stop4h 09m

Helena

Sat 9/19

12:57 pm-4:35 pm

1 stop4h 38m

$434

OntarioHelena

ONT Ontario - HLN Helena

ONTHLN

Ontario

Mon 9/28

6:00 am-12:17 pm

1 stop5h 17m

Helena

Tue 9/29

7:15 am-12:14 pm

1 stop5h 59m

$444

OntarioHelena

ONT Ontario - HLN Helena

ONTHLN

Ontario

Sat 1/30

7:10 am-4:23 pm

2 stops8h 13m

Helena

Wed 2/3

5:00 pm-5:22 pm

2 stops25h 22m

$503

OntarioHelena

ONT Ontario - HLN Helena

ONTHLN

Ontario

Sat 1/30

5:57 pm-4:23 pm

2 stops21h 26m

Helena

Wed 2/3

5:00 pm-5:22 pm

2 stops25h 22m

$510

OntarioHelena

ONT Ontario - HLN Helena

ONTHLN

Ontario

Sat 1/30

7:10 am-4:23 pm

2 stops8h 13m

Helena

Wed 2/3

5:00 pm-5:22 pm

2 stops25h 22m

$514

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?

Delta, 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 58% of people opting to fly with this airline when traveling to Helena. Keep in mind that there are 6 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

Best Price Found	$165
Fastest flight time	4h 09m
Direct flights	None

The best one-way flight to Helena from Ontario in the past 72 hours is $165. The best round-trip flight deal from Ontario to Helena found on momondo in the last 72 hours is $329.

The fastest flight from Ontario to Helena takes 4h 09m

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 09m.
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 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.

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.