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Helena

$162+ Cheap flights from Ontario to Helena (ONT - HLN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — HLN
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Ontario to Helena

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Helena (HLN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 17, 2025.

Round-trip from

$373
(Alaska Airlines)

One-way from

$162
(Alaska Airlines)

Popular in

February

Cheapest in

June

Average price

$570
From Ontario to Helena
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One-way flight from Ontario to Helena
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Highest demand for flights based on searches. 21% potential increase in price ($134 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Helena

Cheapest flights from Ontario to Helena
Explore the most affordable flight options available from Ontario to Helena. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/177:43 pmONT - HLN
1 stop20h 58mAlaska Airlines
Sun 10/196:18 pmHLN - ONT
1 stop19h 19mAlaska Airlines
Deal found 9/15$373
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/296:00 amONT - HLN
1 stop5h 20mDelta
Mon 10/65:45 amHLN - ONT
1 stop4h 20mDelta
Deal found 9/14$455
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/301:15 pmONT - HLN
1 stop6h 45mUnited Airlines
Wed 10/16:30 amHLN - ONT
1 stop7h 21mUnited Airlines
Deal found 9/16$577
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/245:10 amONT - HLN
1 stop7h 20mUnited Airlines
Sat 10/42:42 pmHLN - ONT
1 stop6h 42mUnited Airlines
Deal found 9/14$587
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/191:15 pmONT - HLN
1 stop6h 56mUnited Airlines
Thu 9/252:44 pmHLN - ONT
1 stop6h 40mUnited Airlines
Deal found 9/16$647
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/185:10 amONT - HLN
1 stop7h 20mUnited Airlines
Sun 9/212:30 pmHLN - ONT
1 stop7h 13mUnited Airlines
Deal found 9/16$707
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1711:48 amONT - HLN
2 stops9h 28mDelta
Sun 10/191:00 pmHLN - ONT
2 stops10h 41mDelta
Deal found 9/15$792
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/196:00 amONT - HLN
2 stops14h 11mUnited Airlines
Sun 9/212:30 pmHLN - ONT
1 stop7h 13mUnited Airlines
Deal found 9/16$1,001
This United deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/185:10 amONT - HLN
1 stop7h 20mMultiple Airlines
Sun 9/214:02 pmHLN - ONT
2 stops8h 52mMultiple Airlines
Deal found 9/16$1,380
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/307:10 amONT - HLN
2 stops7h 11mAlaska Airlines
Wed 10/14:02 pmHLN - ONT
2 stops18h 24mAlaska Airlines
Deal found 9/16$1,497

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Helena 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, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Ontario to Helena that are best for you.

Fly from

Ontario

Fly to

Helena

Route

Depart

Return

Price

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 10/17

7:43 pm-5:41 pm

1 stop20h 58m

Helena

Sun 10/19

6:18 pm-12:37 pm

1 stop19h 19m

$373

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Mon 9/29

6:00 am-12:20 pm

1 stop5h 20m

Helena

Mon 10/6

5:45 am-9:05 am

1 stop4h 20m

$455

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Tue 9/30

1:15 pm-9:00 pm

1 stop6h 45m

Helena

Wed 10/1

6:30 am-12:51 pm

1 stop7h 21m

$577

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 10/17

11:48 am-10:16 pm

2 stops9h 28m

Helena

Sun 10/19

1:00 pm-10:41 pm

2 stops10h 41m

$792

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Tue 9/30

7:10 am-3:21 pm

2 stops7h 11m

Helena

Wed 10/1

4:02 pm-9:26 am

2 stops18h 24m

$1,497

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sat 11/1

6:00 am-5:36 pm

1 stop10h 36m

$162

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sat 11/22

6:00 am-12:26 pm

1 stop5h 26m

$200

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sun 11/23

5:05 am-1:27 pm

1 stop7h 22m

$210

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sun 11/23

6:45 am-12:26 pm

2 stops28h 41m

$253

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sun 9/28

6:00 am-12:20 pm

1 stop5h 20m

$294

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 15 results
1
2

Best time to book a flight from Ontario to Helena

Have a flexible travel schedule? Discover the best time to fly to Helena from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Helena

What is the cheapest month to book a flight from Ontario to Helena?

Currently, February is the cheapest month in which you can book a flight from Ontario to Helena (average of $353). Flying from Ontario to Helena in May is currently the most expensive (average of $517). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Helena

Get insights into the airlines that provide service to Helena. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Helena. Reviews last updated September 17, 2025.
Read reviews from past customers who have flown Delta from Ontario to Helena. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Delta
8.0
Very good
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Related info for your journey

Find useful and relevant information for your journey from Ontario to Helena. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Helena?

    Airlines like Alaska Airlines, Delta, and United Airlines fly from Ontario to Helena in about 5h 20m. The time it takes to get you to your destination can typically vary by up to 15h 38m. There are 915 mi between Ontario and Helena. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Ontario to Helena round-trip?

    Flying on Delta is currently your cheapest option to Helena, with prices starting at $205.

  • What are the cheapest airlines to fly from Ontario to Helena one-way?

    To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at $162. Delta flights start at $200 while deals on United Airlines start at $210 one-way.

  • Can I find deals for flights from Ontario to Helena that include hotel bookings?

    Yes. In addition to deals on Ontario to Helena flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Helena?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Helena.

  • Can I find deals for business class flights from Ontario to Helena?

    Yes. Cheapflights offers flight deals from Ontario to Helena by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Helena?

    Currently, February is the cheapest month in which you can book a flight from Ontario to Helena (average of $353). Flying from Ontario to Helena in May is currently the most expensive (average of $517). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top airline flying from Ontario to Helena

Discover the top airline that operate flights from Ontario to Helena. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$205Average$410FlexibilityNo cancel feeOn-timeN/A

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