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Cheap flights from Helena to Los Angeles from $166

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to Los Angeles departing on 7/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Helena to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
6:22 pm - 10:32 pm
HLN
-
ONT
5h 10m
1 stop
Alaska Airlines Logo
10:39 am - 5:45 pm
ONT
-
HLN
6h 06m
1 stop
$331Alaska Airlines
Sat, Apr 25 - Wed, Apr 29
Alaska Airlines Logo
6:22 pm - 11:48 pm
HLN
-
ONT
30h 26m
2 stops
Alaska Airlines Logo
10:39 am - 5:45 pm
ONT
-
HLN
6h 06m
1 stop
$412Alaska Airlines
Tue, May 5 - Sat, May 9
United Airlines Logo
2:25 pm - 8:36 pm
HLN
-
ONT
7h 11m
1 stop
United Airlines Logo
5:10 am - 1:39 pm
ONT
-
HLN
7h 29m
1 stop
$414United Airlines
Wed, Apr 15 - Sun, Apr 19
Alaska Airlines Logo
6:22 pm - 10:32 pm
HLN
-
ONT
5h 10m
1 stop
Alaska Airlines Logo
2:59 pm - 5:45 pm
ONT
-
HLN
25h 46m
2 stops
$422Alaska Airlines
Sat, Apr 25 - Wed, Apr 29
Alaska Airlines Logo
6:22 pm - 7:05 pm
HLN
-
ONT
25h 43m
1 stop
Alaska Airlines Logo
6:00 am - 5:45 pm
ONT
-
HLN
10h 45m
1 stop
$433Alaska Airlines
Thu, Apr 23 - Thu, Apr 30
Delta Logo
5:45 am - 8:53 am
HLN
-
ONT
4h 08m
1 stop
Delta Logo
6:00 am - 12:20 pm
ONT
-
HLN
5h 20m
1 stop
$445Delta
Thu, Jun 4 - Sat, Jun 13
Alaska Airlines Logo
6:22 pm - 11:48 pm
HLN
-
ONT
30h 26m
2 stops
Alaska Airlines Logo
10:39 am - 5:45 pm
ONT
-
HLN
6h 06m
1 stop
$452Alaska Airlines
Sat, Apr 25 - Wed, Apr 29
Alaska Airlines Logo
6:22 pm - 10:32 pm
HLN
-
ONT
5h 10m
1 stop
Alaska Airlines Logo
6:00 am - 5:45 pm
ONT
-
HLN
10h 45m
1 stop
$453Alaska Airlines
Wed, Apr 29 - Sun, May 3
Alaska Airlines Logo
6:22 pm - 10:32 pm
HLN
-
ONT
5h 10m
1 stop
Alaska Airlines Logo
7:00 am - 5:45 pm
ONT
-
HLN
33h 45m
2 stops
$461Alaska Airlines
Sat, Apr 25 - Wed, Apr 29
Alaska Airlines Logo
6:22 pm - 10:32 pm
HLN
-
ONT
5h 10m
1 stop
Alaska Airlines Logo
7:00 am - 5:45 pm
ONT
-
HLN
9h 45m
2 stops
$462Alaska Airlines
Wed, Apr 29 - Sun, May 3

United Airlines flights from Helena to Ontario

Our best United Airlines deals on Helena to Ontario flight tickets
United Airlines
Apr 15
HLN2:25 pmHelena
7h 11m
1 stop
ONT8:36 pmOntario
Apr 19
ONT5:10 amOntario
7h 29m
1 stop
HLN1:39 pmHelena
$414
United Airlines
Apr 15
HLN6:15 amHelena
12h 32m
2 stops
ONT5:47 pmOntario
Apr 19
ONT5:10 amOntario
7h 29m
1 stop
HLN1:39 pmHelena
$547
United Airlines
Apr 7
HLN2:25 pmHelena
7h 11m
1 stop
ONT8:36 pmOntario
Apr 11
ONT5:10 amOntario
7h 29m
1 stop
HLN1:39 pmHelena
$667

Alaska Airlines flights from Helena to Ontario

Our best Alaska Airlines deals on Helena to Ontario flight tickets
Alaska Airlines
Apr 25
HLN6:22 pmHelena
5h 10m
1 stop
ONT10:32 pmOntario
Apr 29
ONT10:39 amOntario
6h 06m
1 stop
HLN5:45 pmHelena
$331
Alaska Airlines
May 5
HLN6:22 pmHelena
30h 26m
2 stops
ONT11:48 pmOntario
May 9
ONT10:39 amOntario
6h 06m
1 stop
HLN5:45 pmHelena
$412
Alaska Airlines
Apr 25
HLN6:22 pmHelena
5h 10m
1 stop
ONT10:32 pmOntario
Apr 29
ONT2:59 pmOntario
25h 46m
2 stops
HLN5:45 pmHelena
$422

momondo Fare Finder

 
Customize your flight search to find flights from Helena to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 28, 2026.
Use the filters below to find and compare flights from Helena to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 4/25

6:22 pm-10:32 pm

1 stop5h 10m

Ontario

Wed 4/29

10:39 am-5:45 pm

1 stop6h 06m

$331

HelenaOntario

HLN - ONT

HLNONT

Helena

Tue 5/5

6:22 pm-11:48 pm

2 stops30h 26m

Ontario

Sat 5/9

10:39 am-5:45 pm

1 stop6h 06m

$412

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 4/15

2:25 pm-8:36 pm

1 stop7h 11m

Ontario

Sun 4/19

5:10 am-1:39 pm

1 stop7h 29m

$414

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 4/25

6:22 pm-10:32 pm

1 stop5h 10m

Ontario

Wed 4/29

2:59 pm-5:45 pm

2 stops25h 46m

$422

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 4/23

6:22 pm-7:05 pm

1 stop25h 43m

Ontario

Thu 4/30

6:00 am-5:45 pm

1 stop10h 45m

$433
Quickest round-trip

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 6/4

5:45 am-8:53 am

1 stop4h 08m

Ontario

Sat 6/13

6:00 am-12:20 pm

1 stop5h 20m

$445

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 4/25

6:22 pm-11:48 pm

2 stops30h 26m

Ontario

Wed 4/29

10:39 am-5:45 pm

1 stop6h 06m

$452

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 4/29

6:22 pm-10:32 pm

1 stop5h 10m

Ontario

Sun 5/3

6:00 am-5:45 pm

1 stop10h 45m

$453

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 4/25

6:22 pm-10:32 pm

1 stop5h 10m

Ontario

Wed 4/29

7:00 am-5:45 pm

2 stops33h 45m

$461

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 4/29

6:22 pm-10:32 pm

1 stop5h 10m

Ontario

Sun 5/3

7:00 am-5:45 pm

2 stops9h 45m

$462

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Los Angeles from

How to get the cheapest flight ticket from Helena to Ontario

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 Helena to Ontario?

Alaska Airlines and Delta are the most popular carriers operating from Helena to Ontario

What airlines fly to Ontario?

Delta, United Airlines and Alaska Airlines are the top three most popular airlines that fly to Ontario from Helena according to our data. Delta is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 6 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

When to book flights from Helena to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Helena to Ontario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Helena to Ontario (HLN to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Helena to Ontario

Fastest flight time

4h 05m

Direct flights

None
The fastest flight from Helena to Ontario takes 4h 05m
There are no direct flights from Helena to Ontario. There are no popular flight routes from Helena to Ontario.
Search flight deals

  • How far is Helena to Ontario by plane?

    The straight-line distance from Helena to Ontario is 913.6 mi. Flights usually cover this in 4h 05m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Helena Airport to Ontario Airport?

    Prices for flights from Helena Airport to Ontario Airport were last updated today.

  • How old do you have to be to fly from Helena Airport to Ontario Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Helena Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Helena to Ontario?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Helena to Ontario for you.

Can I find flights from Helena to Ontario with flexible booking policies on momondo?

All flight searches from Helena to Ontario on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Helena to Ontario?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Helena to Ontario.

I’m not ready to book a flight from Helena to Ontario right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Helena to Ontario flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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