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Cheap flights from Helena to Los Angeles from $319

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to Los Angeles departing on 11/5. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Helena to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
7:15 am - 12:22 pm
HLN
-
ONT
6h 07m
1 stop
Delta Logo
5:05 pm - 10:41 pm
ONT
-
HLN
4h 36m
1 stop
$319Delta
Thu, Nov 5 - Mon, Nov 9
Delta Logo
1:03 pm - 10:43 pm
HLN
-
ONT
10h 40m
2 stops
Delta Logo
6:00 am - 12:24 pm
ONT
-
HLN
5h 24m
1 stop
$324Delta
Thu, Nov 5 - Mon, Nov 9
Delta Logo
7:15 am - 12:22 pm
HLN
-
ONT
6h 07m
1 stop
Delta Logo
5:05 pm - 10:41 pm
ONT
-
HLN
4h 36m
1 stop
$338Delta
Thu, Nov 5 - Mon, Nov 9
Delta Logo
7:15 am - 12:22 pm
HLN
-
ONT
6h 07m
1 stop
Delta Logo
5:05 pm - 10:41 pm
ONT
-
HLN
4h 36m
1 stop
$366Delta
Thu, Nov 5 - Mon, Nov 9
Alaska Airlines Logo
4:41 pm - 10:54 pm
HLN
-
ONT
7h 13m
1 stop
Alaska Airlines Logo
5:52 pm - 4:04 pm
ONT
-
HLN
21h 12m
2 stops
$398Alaska Airlines
Thu, Nov 5 - Mon, Nov 9
Alaska Airlines Logo
5:18 pm - 7:03 pm
HLN
-
ONT
26h 45m
1 stop
Alaska Airlines Logo
6:02 am - 4:41 pm
ONT
-
HLN
9h 39m
1 stop
$403Alaska Airlines
Tue, Sep 22 - Sat, Sep 26
Alaska Airlines Logo
5:18 pm - 4:10 pm
HLN
-
ONT
23h 52m
2 stops
Alaska Airlines Logo
6:02 am - 4:41 pm
ONT
-
HLN
9h 39m
1 stop
$408Alaska Airlines
Tue, Sep 22 - Sat, Sep 26
Alaska Airlines Logo
5:18 pm - 7:03 pm
HLN
-
ONT
26h 45m
1 stop
Alaska Airlines Logo
6:02 am - 4:41 pm
ONT
-
HLN
9h 39m
1 stop
$423Alaska Airlines
Tue, Sep 22 - Sat, Sep 26
Alaska Airlines Logo
4:41 pm - 10:54 pm
HLN
-
ONT
7h 13m
1 stop
Alaska Airlines Logo
4:09 pm - 4:04 pm
ONT
-
HLN
22h 55m
1 stop
$428Alaska Airlines
Thu, Nov 5 - Mon, Nov 9
Alaska Airlines Logo
5:18 pm - 4:10 pm
HLN
-
ONT
23h 52m
2 stops
Alaska Airlines Logo
7:12 am - 4:41 pm
ONT
-
HLN
8h 29m
2 stops
$443Alaska Airlines
Tue, Sep 22 - Sat, Sep 26

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Alaska Airlines flights from Helena to Ontario

Our best Alaska Airlines deals on Helena to Ontario flight tickets
Alaska Airlines
Nov 5
HLN4:41 pmHelena
7h 13m
1 stop
ONT10:54 pmOntario
Nov 9
ONT5:52 pmOntario
21h 12m
2 stops
HLN4:04 pmHelena
$398
Alaska Airlines
Sep 22
HLN5:18 pmHelena
26h 45m
1 stop
ONT7:03 pmOntario
Sep 26
ONT6:02 amOntario
9h 39m
1 stop
HLN4:41 pmHelena
$403
Alaska Airlines
Sep 22
HLN5:18 pmHelena
23h 52m
2 stops
ONT4:10 pmOntario
Sep 26
ONT6:02 amOntario
9h 39m
1 stop
HLN4:41 pmHelena
$408

United Airlines flights from Helena to Ontario

Our best United Airlines deals on Helena to Ontario flight tickets
United Airlines
Jul 14
HLN6:15 amHelena
7h 32m
1 stop
ONT12:47 pmOntario
Jul 18
ONT1:18 pmOntario
7h 02m
1 stop
HLN9:20 pmHelena
$449
United Airlines
Jul 1
HLN2:20 pmHelena
7h 22m
1 stop
ONT8:42 pmOntario
Jul 8
ONT1:18 pmOntario
7h 02m
1 stop
HLN9:20 pmHelena
$549

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 June 30, 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
Quickest round-trip

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 11/5

7:15 am-12:22 pm

1 stop6h 07m

Ontario

Mon 11/9

5:05 pm-10:41 pm

1 stop4h 36m

$319

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 11/5

1:03 pm-10:43 pm

2 stops10h 40m

Ontario

Mon 11/9

6:00 am-12:24 pm

1 stop5h 24m

$324

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 11/5

7:15 am-12:22 pm

1 stop6h 07m

Ontario

Mon 11/9

5:05 pm-10:41 pm

1 stop4h 36m

$338

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 11/5

7:15 am-12:22 pm

1 stop6h 07m

Ontario

Mon 11/9

5:05 pm-10:41 pm

1 stop4h 36m

$366

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 11/5

4:41 pm-10:54 pm

1 stop7h 13m

Ontario

Mon 11/9

5:52 pm-4:04 pm

2 stops21h 12m

$398

HelenaOntario

HLN - ONT

HLNONT

Helena

Tue 9/22

5:18 pm-7:03 pm

1 stop26h 45m

Ontario

Sat 9/26

6:02 am-4:41 pm

1 stop9h 39m

$403

HelenaOntario

HLN - ONT

HLNONT

Helena

Tue 9/22

5:18 pm-4:10 pm

2 stops23h 52m

Ontario

Sat 9/26

6:02 am-4:41 pm

1 stop9h 39m

$408

HelenaOntario

HLN - ONT

HLNONT

Helena

Tue 9/22

5:18 pm-7:03 pm

1 stop26h 45m

Ontario

Sat 9/26

6:02 am-4:41 pm

1 stop9h 39m

$423

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 11/5

4:41 pm-10:54 pm

1 stop7h 13m

Ontario

Mon 11/9

4:09 pm-4:04 pm

1 stop22h 55m

$428

HelenaOntario

HLN - ONT

HLNONT

Helena

Tue 9/22

5:18 pm-4:10 pm

2 stops23h 52m

Ontario

Sat 9/26

7:12 am-4:41 pm

2 stops8h 29m

$443

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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?

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

What airlines fly to Ontario?

United Airlines, Delta and Alaska Airlines are the top three most popular airlines that fly to Ontario from Helena according to our data. United Airlines is the first choice among our users, with 38% 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 41m

Direct flights

None
The fastest flight from Helena to Ontario takes 4h 41m
There are no direct flights from Helena to Ontario. There are no popular flight routes from Helena to Ontario.
Search flight deals

Frequently asked questions about flying from Helena to Ontario

  • 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 41m, 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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