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$160+ Cheap flights from Helena to Ontario (HLN - ONT)

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 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — ONT
Jul 19 — Jul 261
Sun 7/19
Sun 7/26
1 adult, Economy
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Cheap 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 June 19, 2026.

This Delta deal was found by Cheapflights users on 6/16. 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.
Thu 11/55:45 am
HLN
-
ONT
1 stop4h 22m
Delta
Mon 11/95:05 pm
ONT
-
HLN
1 stop4h 36m
Delta
Deal found 6/16$319
This Alaska Airlines deal was found by Cheapflights users on 6/15. 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.
Tue 9/225:18 pm
HLN
-
ONT
1 stop26h 45m
Alaska Airlines
Sat 9/266:02 am
ONT
-
HLN
1 stop9h 39m
Alaska Airlines
Deal found 6/15$413
This Alaska Airlines deal was found by Cheapflights users on 6/17. 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.
Thu 11/54:41 pm
HLN
-
ONT
2 stops26h 10m
Alaska Airlines
Mon 11/95:52 pm
ONT
-
HLN
2 stops21h 12m
Alaska Airlines
Deal found 6/17$493
This Alaska Airlines deal was found by Cheapflights users on 6/16. 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.
Fri 10/164:48 pm
HLN
-
ONT
2 stops25h 20m
Alaska Airlines
Mon 10/195:48 pm
ONT
-
HLN
2 stops21h 23m
Alaska Airlines
Deal found 6/16$506

Find 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 June 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$319
(Delta)

One-way from

$160
(Delta)
Provider with most accurate pricing for Helena-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Helena-Ontario flights.
Search Deals
From Helena to Ontario
Search Deals
One-way flight from Helena to Ontario
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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 June 19, 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

Fri 10/16

5:45 am-9:07 am

1 stop4h 22m

Ontario

Mon 10/19

6:00 am-12:24 pm

1 stop5h 24m

$319
Quickest round-trip

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 11/5

5:45 am-9:07 am

1 stop4h 22m

Ontario

Mon 11/9

5:05 pm-10:41 pm

1 stop4h 36m

$319

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

$413
Cheapest one-way
Quickest one-way

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 7/15

5:40 am-8:47 am

1 stop4h 07m

$160

HelenaOntario

HLN - ONT

HLNONT

Helena

Mon 9/21

7:15 am-12:10 pm

1 stop5h 55m

$160

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 7/2

5:09 pm-11:11 pm

1 stop7h 02m

$220

HelenaOntario

HLN - ONT

HLNONT

Helena

Tue 6/30

1:00 pm-4:41 pm

1 stop4h 41m

$220

HelenaOntario

HLN - ONT

HLNONT

Helena

Mon 6/29

5:09 pm-11:11 pm

1 stop7h 02m

$265

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 7/15

6:15 am-12:47 pm

1 stop7h 32m

$296

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/15

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on Helena-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Helena-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Helena-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Helena-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Helena-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

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?

    Delta can get you from Helena to Ontario in just under 4h 22m. Your travel time can differ by up to . The distance from Helena to Ontario is about 915 mi.

  • 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.

See more FAQs

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