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Cheap flights from Helena to Los Angeles from $160

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 6/9. 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.
Delta Logo
5:45 am - 9:01 am
HLN
-
ONT
4h 16m
1 stop
Delta Logo
6:00 am - 12:23 pm
ONT
-
HLN
5h 23m
1 stop
$319Delta
Sun, Sep 13 - Sat, Sep 19
Alaska Airlines Logo
5:18 pm - 11:24 pm
HLN
-
ONT
7h 06m
1 stop
Alaska Airlines Logo
3:12 pm - 4:41 pm
ONT
-
HLN
24h 29m
1 stop
$482Alaska Airlines
Thu, Sep 24 - Mon, Sep 28
Alaska Airlines Logo
5:18 pm - 11:24 pm
HLN
-
ONT
7h 06m
1 stop
Alaska Airlines Logo
6:12 pm - 4:41 pm
ONT
-
HLN
21h 29m
2 stops
$487Alaska Airlines
Thu, Sep 24 - Mon, Sep 28
Alaska Airlines Logo
5:18 pm - 11:24 pm
HLN
-
ONT
7h 06m
1 stop
Alaska Airlines Logo
6:00 am - 4:41 pm
ONT
-
HLN
9h 41m
1 stop
$611Alaska Airlines
Sun, Sep 13 - Sat, Sep 19
Alaska Airlines Logo
5:09 pm - 8:36 pm
HLN
-
ONT
28h 27m
1 stop
Alaska Airlines Logo
6:02 am - 4:32 pm
ONT
-
HLN
9h 30m
1 stop
$673Alaska Airlines
Thu, Jun 11 - Tue, Jun 16
Delta Logo
5:45 am - 9:01 am
HLN
-
ONT
4h 16m
1 stop
Delta Logo
6:00 am - 12:23 pm
ONT
-
HLN
5h 23m
1 stop
$769Delta
Sun, Sep 13 - Sat, Sep 19
Delta Logo
5:35 am - 8:50 am
HLN
-
ONT
4h 15m
1 stop
Delta Logo
6:00 am - 12:20 pm
ONT
-
HLN
5h 20m
1 stop
$807Delta
Fri, Jun 12 - Sat, Jun 13
Alaska Airlines Logo
5:09 pm - 11:14 am
HLN
-
ONT
19h 05m
1 stop
Alaska Airlines Logo
9:20 pm - 4:32 pm
ONT
-
HLN
18h 12m
1 stop
$817Alaska Airlines
Fri, Jun 12 - Sat, Jun 13
Alaska Airlines Logo
5:09 pm - 6:03 pm
HLN
-
ONT
25h 54m
2 stops
Alaska Airlines Logo
9:20 pm - 4:32 pm
ONT
-
HLN
18h 12m
1 stop
$848Alaska Airlines
Fri, Jun 12 - Sat, Jun 13
Alaska Airlines Logo
5:09 pm - 11:14 am
HLN
-
ONT
19h 05m
1 stop
Alaska Airlines Logo
9:20 pm - 4:32 pm
ONT
-
HLN
18h 12m
1 stop
$865Alaska Airlines
Fri, Jun 12 - Sat, Jun 13

Alaska Airlines flights from Helena to Ontario

Our best Alaska Airlines deals on Helena to Ontario flight tickets
Alaska Airlines
Sep 24
HLN5:18 pmHelena
7h 06m
1 stop
ONT11:24 pmOntario
Sep 28
ONT3:12 pmOntario
24h 29m
1 stop
HLN4:41 pmHelena
$482
Alaska Airlines
Sep 24
HLN5:18 pmHelena
7h 06m
1 stop
ONT11:24 pmOntario
Sep 28
ONT6:12 pmOntario
21h 29m
2 stops
HLN4:41 pmHelena
$487
Alaska Airlines
Sep 13
HLN5:18 pmHelena
7h 06m
1 stop
ONT11:24 pmOntario
Sep 19
ONT6:00 amOntario
9h 41m
1 stop
HLN4:41 pmHelena
$611

Delta flights from Helena to Ontario

Our best Delta deals on Helena to Ontario flight tickets
Delta
Sep 13
HLN5:45 amHelena
4h 16m
1 stop
ONT9:01 amOntario
Sep 19
ONT6:00 amOntario
5h 23m
1 stop
HLN12:23 pmHelena
$319
Delta
Sep 13
HLN5:45 amHelena
4h 16m
1 stop
ONT9:01 amOntario
Sep 19
ONT6:00 amOntario
5h 23m
1 stop
HLN12:23 pmHelena
$769
Delta
Jun 12
HLN5:35 amHelena
4h 15m
1 stop
ONT8:50 amOntario
Jun 13
ONT6:00 amOntario
5h 20m
1 stop
HLN12:20 pmHelena
$807

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 May 15, 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

Sun 9/13

5:45 am-9:01 am

1 stop4h 16m

Ontario

Sat 9/19

6:00 am-12:23 pm

1 stop5h 23m

$319

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 9/24

5:18 pm-11:24 pm

1 stop7h 06m

Ontario

Mon 9/28

3:12 pm-4:41 pm

1 stop24h 29m

$482

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 9/24

5:18 pm-11:24 pm

1 stop7h 06m

Ontario

Mon 9/28

6:12 pm-4:41 pm

2 stops21h 29m

$487

HelenaOntario

HLN - ONT

HLNONT

Helena

Sun 9/13

5:18 pm-11:24 pm

1 stop7h 06m

Ontario

Sat 9/19

6:00 am-4:41 pm

1 stop9h 41m

$611

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 6/11

5:09 pm-8:36 pm

1 stop28h 27m

Ontario

Tue 6/16

6:02 am-4:32 pm

1 stop9h 30m

$673

HelenaOntario

HLN - ONT

HLNONT

Helena

Sun 9/13

5:45 am-9:01 am

1 stop4h 16m

Ontario

Sat 9/19

6:00 am-12:23 pm

1 stop5h 23m

$769
Quickest round-trip

HelenaOntario

HLN - ONT

HLNONT

Helena

Fri 6/12

5:35 am-8:50 am

1 stop4h 15m

Ontario

Sat 6/13

6:00 am-12:20 pm

1 stop5h 20m

$807

HelenaOntario

HLN - ONT

HLNONT

Helena

Fri 6/12

5:09 pm-11:14 am

1 stop19h 05m

Ontario

Sat 6/13

9:20 pm-4:32 pm

1 stop18h 12m

$817

HelenaOntario

HLN - ONT

HLNONT

Helena

Fri 6/12

5:09 pm-6:03 pm

2 stops25h 54m

Ontario

Sat 6/13

9:20 pm-4:32 pm

1 stop18h 12m

$848

HelenaOntario

HLN - ONT

HLNONT

Helena

Fri 6/12

5:09 pm-11:14 am

1 stop19h 05m

Ontario

Sat 6/13

9:20 pm-4:32 pm

1 stop18h 12m

$865

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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?

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 15m

Direct flights

None
The fastest flight from Helena to Ontario takes 4h 15m
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 15m, 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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