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$495+ Cheap flights from Lewiston, ID to Ontario (LWS - 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 6/11. Fares are subject to change and may not be available on all flights or dates of travel.
LWS — ONT
Apr 14 — Apr 211
Tue 4/14
Tue 4/21
1 adult, Economy
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Cheap flight deals from Lewiston to Ontario

Cheapest flights from Lewiston to Ontario
Explore the most affordable flight options available from Lewiston to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 15, 2026.

This Delta deal was found by Cheapflights users on 3/12. 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 6/119:00 am
LWS
-
ONT
1 stop27h 49m
Delta
Mon 6/222:00 pm
ONT
-
LWS
1 stop7h 05m
Delta
Deal found 3/12$495
This Delta deal was found by Cheapflights users on 3/12. 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 6/129:00 am
LWS
-
ONT
1 stop26h 14m
Delta
Mon 6/222:00 pm
ONT
-
LWS
1 stop7h 05m
Delta
Deal found 3/12$515
This Delta deal was found by Cheapflights users on 3/11. 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 4/612:10 pm
LWS
-
ONT
1 stop4h 18m
Delta
Fri 4/105:09 pm
ONT
-
LWS
2 stops29h 51m
Delta
Deal found 3/11$570
This Delta deal was found by Cheapflights users on 3/11. 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.
Sun 4/512:10 pm
LWS
-
ONT
1 stop4h 18m
Delta
Thu 4/95:53 pm
ONT
-
LWS
1 stop5h 07m
Delta
Deal found 3/11$668
This Delta deal was found by Cheapflights users on 3/11. 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.
Sun 4/512:10 pm
LWS
-
ONT
1 stop4h 18m
Delta
Fri 4/105:09 pm
ONT
-
LWS
1 stop18h 18m
Delta
Deal found 3/11$672
This Delta deal was found by Cheapflights users on 3/11. 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 4/612:10 pm
LWS
-
ONT
1 stop4h 18m
Delta
Thu 4/96:00 am
ONT
-
LWS
1 stop5h 27m
Delta
Deal found 3/11$724

Find flight deals from Lewiston to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Lewiston (LWS) 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 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$495
(Delta)
Provider with most accurate pricing for Lewiston Nez Perce Rgnl-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lewiston Nez Perce Rgnl-Ontario flights.
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From Lewiston Nez Perce Rgnl to Ontario
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Lewiston 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 15, 2026.
Use the filters below to find and compare flights from Lewiston to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LewistonOntario

LWS - ONT

LWSONT

Lewiston Nez Perce Rgnl

Mon 4/6

12:10 pm-4:28 pm

1 stop4h 18m

Ontario

Fri 4/10

5:09 pm-11:00 pm

2 stops29h 51m

$570
Quickest round-trip

LewistonOntario

LWS - ONT

LWSONT

Lewiston Nez Perce Rgnl

Sun 4/5

12:10 pm-4:28 pm

1 stop4h 18m

Ontario

Thu 4/9

5:53 pm-11:00 pm

1 stop5h 07m

$668

LewistonOntario

LWS - ONT

LWSONT

Lewiston Nez Perce Rgnl

Mon 4/6

12:10 pm-4:28 pm

1 stop4h 18m

Ontario

Thu 4/9

6:00 am-11:27 am

1 stop5h 27m

$724

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on Lewiston, Idaho-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Lewiston, Idaho-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Lewiston, Idaho-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Lewiston, Idaho-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 Lewiston, Idaho-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 Lewiston to Ontario

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

What is the cheapest month to book a flight from Lewiston, Idaho to Ontario?

Currently, August is the cheapest month in which you can book a flight from Lewiston, Idaho to Ontario (average of $45). Flying from Lewiston, Idaho to Ontario in December is currently the most expensive (average of $177). 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 Lewiston 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 Lewiston, Idaho to Ontario?

    A quick flight from Lewiston, Idaho to Ontario can take about 4h 18m. Delta provides one of the quickest options available for as low as $570. There are 851 mi between Lewiston, Idaho and Ontario.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Lewiston 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 Lewiston, Idaho to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Lewiston, Idaho to Ontario (average of $45). Flying from Lewiston, Idaho to Ontario in December is currently the most expensive (average of $177). 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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