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$373+ Cheap flights from Helena to Ontario (HLN - ONT)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — ONT
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Helena to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Helena (HLN) to Ontario (ONT). 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 16, 2025.

Round-trip from

$373
(Alaska Airlines)

Popular in

December

Cheapest in

April

Average price

$286
From Helena to Ontario
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($113 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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Find flight deals from Helena to Ontario

Cheapest flights from Helena to Ontario
Explore the most affordable flight options available from Helena to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/156:18 pmHLN - ONT
1 stop6h 45mAlaska Airlines
Tue 10/217:43 pmONT - HLN
1 stop20h 58mAlaska Airlines
Deal found 9/14$373
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/156:18 pmHLN - ONT
1 stop6h 45mAlaska Airlines
Mon 10/207:43 pmONT - HLN
1 stop20h 58mAlaska Airlines
Deal found 9/14$423
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/156:18 pmHLN - ONT
1 stop6h 45mAlaska Airlines
Sun 10/196:00 amONT - HLN
1 stop10h 41mAlaska Airlines
Deal found 9/14$499
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 10/155:18 pmHLN - ONT
1 stop28h 06mUnited Airlines
Mon 10/206:36 pmONT - HLN
2 stops21h 04mUnited Airlines
Deal found 9/14$500
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:00 pmHLN - ONT
2 stops10h 41mDelta
Mon 11/34:35 pmONT - HLN
1 stop4h 41mDelta
Deal found 9/16$541
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/165:18 pmHLN - ONT
1 stop25h 05mUnited Airlines
Sun 10/195:05 amONT - HLN
1 stop10h 35mUnited Airlines
Deal found 9/15$542
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/221:00 pmHLN - ONT
1 stop3h 57mDelta
Wed 9/246:00 amONT - HLN
1 stop5h 20mDelta
Deal found 9/14$544
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/192:26 pmHLN - ONT
1 stop7h 41mUnited Airlines
Mon 12/295:05 amONT - HLN
1 stop15h 26mUnited Airlines
Deal found 9/15$561
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 12/196:32 pmHLN - ONT
2 stops30h 27mAlaska Airlines
Mon 12/297:18 pmONT - HLN
1 stop21h 37mAlaska Airlines
Deal found 9/15$576

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Helena to Ontario that are best for you.

Fly from

Helena

Fly to

Ontario

Route

Depart

Return

Price

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 10/15

6:18 pm-12:03 am

1 stop6h 45m

Ontario

Tue 10/21

7:43 pm-5:41 pm

1 stop20h 58m

$373

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 10/15

6:18 pm-12:03 am

1 stop6h 45m

Ontario

Mon 10/20

7:43 pm-5:41 pm

1 stop20h 58m

$423

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 10/15

6:18 pm-12:03 am

1 stop6h 45m

Ontario

Sun 10/19

6:00 am-5:41 pm

1 stop10h 41m

$499

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 10/15

5:18 pm-8:24 pm

1 stop28h 06m

Ontario

Mon 10/20

6:36 pm-4:40 pm

2 stops21h 04m

$500

HelenaOntario

HLN - ONT

HLNONT

Helena

Fri 10/31

1:00 pm-10:41 pm

2 stops10h 41m

Ontario

Mon 11/3

4:35 pm-10:16 pm

1 stop4h 41m

$541

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 10/16

5:18 pm-5:23 pm

1 stop25h 05m

Ontario

Sun 10/19

5:05 am-4:40 pm

1 stop10h 35m

$542

HelenaOntario

HLN - ONT

HLNONT

Helena

Fri 12/19

2:26 pm-9:07 pm

1 stop7h 41m

Ontario

Mon 12/29

5:05 am-9:31 pm

1 stop15h 26m

$561

HelenaOntario

HLN - ONT

HLNONT

Helena

Fri 12/19

6:32 pm-11:59 pm

2 stops30h 27m

Ontario

Mon 12/29

7:18 pm-5:55 pm

1 stop21h 37m

$576

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 11/22

2:22 pm-8:44 pm

1 stop7h 22m

Ontario

Sat 11/29

5:05 am-9:22 pm

1 stop15h 17m

$646

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 10/16

6:18 pm-11:51 pm

2 stops30h 33m

Ontario

Sun 10/19

6:00 am-5:41 pm

1 stop10h 41m

$707

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 12 results
1
2

Best time to book a flight from Helena to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Helena 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 Helena to Ontario

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

Currently, August is the cheapest month in which you can book a flight from Helena to Ontario (average of $246). Flying from Helena to Ontario in March is currently the most expensive (average of $327). 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 Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated September 16, 2025.
Get a feel of what it's like to fly with Delta from Helena to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Helena to Ontario. 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 Helena to Ontario?

    Alaska Airlines and United Airlines can get you from Helena to Ontario in just under 6h 45m. Your travel time can differ by up to 21h 21m. The distance from Helena to Ontario is about 915 mi. 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 Helena to Ontario round-trip?

    Flying on Delta is currently your cheapest option to Ontario, with prices starting at $294.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Helena to Ontario 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 Helena to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Helena to Ontario (average of $246). Flying from Helena to Ontario in March is currently the most expensive (average of $327). 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.

See more FAQs

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Alternative routes for Helena to Ontario

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Top airline flying from Helena to Ontario

Discover the top airline that operate flights from Helena to Ontario. 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$294Average$358FlexibilityNo cancel feeOn-timeN/A

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