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Ontario

$166+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — ONT
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
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 March 22, 2026.

This Alaska Airlines deal was found by Cheapflights users on 3/17. 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.
Sat 4/256:22 pm
HLN
-
ONT
1 stop16h 23m
Alaska Airlines
Wed 4/296:00 am
ONT
-
HLN
1 stop10h 45m
Alaska Airlines
Deal found 3/17$305
This Delta deal was found by Cheapflights users on 3/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/231:03 pm
HLN
-
ONT
1 stop4h 14m
Delta
Thu 5/286:00 am
ONT
-
HLN
1 stop5h 23m
Delta
Deal found 3/17$331
This Delta deal was found by Cheapflights users on 3/20. 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.
Tue 5/261:03 pm
HLN
-
ONT
2 stops10h 31m
Delta
Thu 5/284:57 pm
ONT
-
HLN
1 stop4h 36m
Delta
Deal found 3/20$370
This Alaska Airlines deal was found by Cheapflights users on 3/19. 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 5/56:22 pm
HLN
-
ONT
2 stops30h 26m
Alaska Airlines
Sat 5/910:39 am
ONT
-
HLN
1 stop6h 06m
Alaska Airlines
Deal found 3/19$372
This Delta deal was found by Cheapflights users on 3/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:45 am
HLN
-
ONT
1 stop4h 08m
Delta
Wed 5/274:57 pm
ONT
-
HLN
1 stop4h 36m
Delta
Deal found 3/17$375
This United Airlines deal was found by Cheapflights users on 3/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/272:20 pm
HLN
-
ONT
1 stop7h 22m
United Airlines
Sat 5/301:18 pm
ONT
-
HLN
1 stop7h 02m
United Airlines
Deal found 3/17$401
This Travelocity deal was found by Cheapflights users on 3/20. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/215:26 pm
HLN
-
ONT
1 stop6h 45m
Alaska Airlines
Sat 7/256:00 am
ONT
-
HLN
1 stop9h 49m
Alaska Airlines
Deal found 3/20$411
This Delta deal was found by Cheapflights users on 3/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:45 am
HLN
-
ONT
1 stop4h 08m
Delta
Mon 6/14:57 pm
ONT
-
HLN
1 stop4h 36m
Delta
Deal found 3/17$419
This Alaska Airlines deal was found by Cheapflights users on 3/19. 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 5/154:43 pm
HLN
-
ONT
1 stop8h 15m
Alaska Airlines
Tue 5/196:00 am
ONT
-
HLN
1 stop9h 06m
Alaska Airlines
Deal found 3/19$450
This Delta deal was found by Cheapflights users on 3/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/231:03 pm
HLN
-
ONT
1 stop4h 14m
Delta
Sun 5/316:00 am
ONT
-
HLN
1 stop5h 23m
Delta
Deal found 3/17$463

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 March 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$265
(Alaska Airlines)

One-way from

$166
(Alaska Airlines)

Popular in

November

Cheapest in

February

Average price

$295
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
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 22, 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

Sat 4/25

6:22 pm-9:45 am

1 stop16h 23m

Ontario

Wed 4/29

6:00 am-5:45 pm

1 stop10h 45m

$305

HelenaOntario

HLN - ONT

HLNONT

Helena

Sun 5/24

1:03 pm-4:17 pm

1 stop4h 14m

Ontario

Sat 5/30

6:00 am-12:23 pm

1 stop5h 23m

$331
Quickest round-trip

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 5/28

5:45 am-8:53 am

1 stop4h 08m

Ontario

Mon 6/1

4:57 pm-10:33 pm

1 stop4h 36m

$331

HelenaOntario

HLN - ONT

HLNONT

Helena

Tue 5/5

6:22 pm-10:32 pm

1 stop5h 10m

Ontario

Sat 5/9

10:39 am-5:45 pm

1 stop6h 06m

$331

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 5/28

5:45 am-8:53 am

1 stop4h 08m

Ontario

Tue 6/2

4:57 pm-10:33 pm

1 stop4h 36m

$331

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 5/27

5:45 am-8:53 am

1 stop4h 08m

Ontario

Thu 5/28

6:00 am-12:23 pm

1 stop5h 23m

$375
Cheapest one-way
Quickest one-way

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 7/4

5:26 pm-11:11 pm

1 stop6h 45m

$166

HelenaOntario

HLN - ONT

HLNONT

Helena

Sun 7/5

5:26 pm-11:14 am

1 stop18h 48m

$412

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/22

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.

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, January is the cheapest month in which you can book a flight from Helena to Ontario (average of $108). Flying from Helena to Ontario in September is currently the most expensive (average of $229). 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.

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 Delta can get you from Helena to Ontario in just under 4h 08m. Your travel time can differ by up to 12h 15m. 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.

  • 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, January is the cheapest month in which you can book a flight from Helena to Ontario (average of $108). Flying from Helena to Ontario in September is currently the most expensive (average of $229). 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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