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.

$175 Cheap Flights from Ontario to Helena in 2026

Find the cheapest flights from Ontario to Helena

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 12:17 pm

ONT

HLN

5h 17m

1 stop

7:15 am - 12:14 pm

HLN

ONT

5h 59m

1 stop

$319Delta

Fri, Sep 18 - Thu, Sep 24

6:00 am - 12:17 pm

ONT

HLN

5h 17m

1 stop

12:57 pm - 10:40 pm

HLN

ONT

10h 43m

2 stops

$324Delta

Fri, Sep 18 - Thu, Sep 24

5:05 pm - 10:30 pm

ONT

HLN

4h 25m

1 stop

6:50 am - 12:16 pm

HLN

ONT

6h 26m

1 stop

$352Delta

Sat, Aug 22 - Sat, Aug 29

6:02 am - 4:41 pm

ONT

HLN

9h 39m

1 stop

5:18 pm - 11:24 pm

HLN

ONT

7h 06m

1 stop

$353Alaska Airlines

Thu, Sep 17 - Thu, Sep 24

5:15 pm - 10:24 pm

ONT

HLN

4h 09m

1 stop

12:57 pm - 10:40 pm

HLN

ONT

10h 43m

2 stops

$358Delta

Fri, Sep 25 - Mon, Sep 28

6:00 am - 12:17 pm

ONT

HLN

5h 17m

1 stop

7:15 am - 12:14 pm

HLN

ONT

5h 59m

1 stop

$374Delta

Fri, Sep 18 - Thu, Sep 24

6:00 am - 12:17 pm

ONT

HLN

5h 17m

1 stop

12:57 pm - 10:40 pm

HLN

ONT

10h 43m

2 stops

$379Delta

Fri, Sep 18 - Thu, Sep 24

7:59 pm - 4:34 pm

ONT

HLN

19h 35m

1 stop

5:11 pm - 11:24 pm

HLN

ONT

7h 13m

1 stop

$381Alaska Airlines

Thu, Aug 27 - Mon, Aug 31

7:59 pm - 4:34 pm

ONT

HLN

19h 35m

1 stop

5:11 pm - 7:03 pm

HLN

ONT

26h 52m

1 stop

$388Alaska Airlines

Thu, Aug 27 - Mon, Aug 31

7:59 pm - 4:34 pm

ONT

HLN

19h 35m

1 stop

5:11 pm - 3:47 pm

HLN

ONT

23h 36m

2 stops

$393Alaska Airlines

Thu, Aug 27 - Mon, Aug 31

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Delta flights from Ontario to Helena

Our best Delta deals on Ontario to Helena flight tickets

Delta

Sep 18

ONT6:00 amOntario

5h 17m

1 stop

HLN12:17 pmHelena

Sep 24

HLN7:15 amHelena

5h 59m

1 stop

ONT12:14 pmOntario

$319

Delta

Sep 18

ONT6:00 amOntario

5h 17m

1 stop

HLN12:17 pmHelena

Sep 24

HLN12:57 pmHelena

10h 43m

2 stops

ONT10:40 pmOntario

$324

Delta

Aug 22

ONT5:05 pmOntario

4h 25m

1 stop

HLN10:30 pmHelena

Aug 29

HLN6:50 amHelena

6h 26m

1 stop

ONT12:16 pmOntario

$352

Alaska Airlines flights from Ontario to Helena

Our best Alaska Airlines deals on Ontario to Helena flight tickets

Alaska Airlines

Sep 17

ONT6:02 amOntario

9h 39m

1 stop

HLN4:41 pmHelena

Sep 24

HLN5:18 pmHelena

7h 06m

1 stop

ONT11:24 pmOntario

$353

Alaska Airlines

Aug 27

ONT7:59 pmOntario

19h 35m

1 stop

HLN4:34 pmHelena

Aug 31

HLN5:11 pmHelena

7h 13m

1 stop

ONT11:24 pmOntario

$381

Alaska Airlines

Aug 27

ONT7:59 pmOntario

19h 35m

1 stop

HLN4:34 pmHelena

Aug 31

HLN5:11 pmHelena

26h 52m

1 stop

ONT7:03 pmOntario

$388

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 9/18

6:00 am-12:17 pm

1 stop5h 17m

Helena

Thu 9/24

7:15 am-12:14 pm

1 stop5h 59m

$319

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 9/18

6:00 am-12:17 pm

1 stop5h 17m

Helena

Thu 9/24

12:57 pm-10:40 pm

2 stops10h 43m

$324

Quickest round-trip

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sat 8/22

5:05 pm-10:30 pm

1 stop4h 25m

Helena

Sat 8/29

6:50 am-12:16 pm

1 stop6h 26m

$352

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 9/17

6:02 am-4:41 pm

1 stop9h 39m

Helena

Thu 9/24

5:18 pm-11:24 pm

1 stop7h 06m

$353

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 9/25

5:15 pm-10:24 pm

1 stop4h 09m

Helena

Mon 9/28

12:57 pm-10:40 pm

2 stops10h 43m

$358

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 9/18

6:00 am-12:17 pm

1 stop5h 17m

Helena

Thu 9/24

7:15 am-12:14 pm

1 stop5h 59m

$374

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 9/18

6:00 am-12:17 pm

1 stop5h 17m

Helena

Thu 9/24

12:57 pm-10:40 pm

2 stops10h 43m

$379

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 8/27

7:59 pm-4:34 pm

1 stop19h 35m

Helena

Mon 8/31

5:11 pm-11:24 pm

1 stop7h 13m

$381

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 8/27

7:59 pm-4:34 pm

1 stop19h 35m

Helena

Mon 8/31

5:11 pm-7:03 pm

1 stop26h 52m

$388

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 8/27

7:59 pm-4:34 pm

1 stop19h 35m

Helena

Mon 8/31

5:11 pm-3:47 pm

2 stops23h 36m

$393

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 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 57% 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

Fastest flight time	4h 09m
Direct flights	None

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.