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$426+ Cheap flights from Ontario to Lewiston, ID (ONT - LWS)

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 7/23. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LWS
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Ontario to Lewiston

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Lewiston (LWS). 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 12, 2025.

Round-trip from

$426
(Delta)

Popular in

June

Cheapest in

July

Average price

$833
From Ontario to Lewiston Nez Perce Rgnl
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($43 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
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Find flight deals from Ontario to Lewiston

Cheapest flights from Ontario to Lewiston
Explore the most affordable flight options available from Ontario to Lewiston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Delta deal was found by Cheapflights users on 6/10. 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 7/239:44 amONT - LWS
1 stop6h 50mDelta
Sat 8/25:20 pmLWS - ONT
1 stop5h 57mDelta
Deal found 6/10$426

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Lewiston 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 12, 2025.
Use the filters below to find and compare flights from Ontario to Lewiston that are best for you.

Fly from

Ontario

Fly to

Lewiston

Route

Depart

Return

Price

OntarioLewiston

ONT - LWS

ONTLWS

Ontario

Wed 7/23

9:44 am-4:34 pm

1 stop6h 50m

Lewiston Nez Perce Rgnl

Sat 8/2

5:20 pm-11:17 pm

1 stop5h 57m

$426

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Best time to book a flight from Ontario to Lewiston

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

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

Currently, February is the cheapest month in which you can book a flight from Ontario to Lewiston, Idaho (average of $278). Flying from Ontario to Lewiston, Idaho in July is currently the most expensive (average of $535). 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.

Rainfall in Lewiston by month

Plan your trip to Lewiston by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Lewiston, Idaho ranges from 0.3 - 1.7 inches per month. June is typically the wettest month, when rainfall can reach 1.7 in. August is typically the driest time to visit Lewiston, Idaho when rainfall is around 0.3 in.

Temperature in Lewiston by month

Plan your trip to Lewiston by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Lewiston, Idaho, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

Reviews of airlines servicing Lewiston

Get insights into the airlines that provide service to Lewiston. 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 Lewiston. Reviews last updated June 12, 2025.
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

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 Lewiston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What is the cheapest airline to fly from Ontario to Lewiston, Idaho round-trip?

    Currently priced at $426, Delta will fly you from Ontario to Lewiston, Idaho and back. In addition to Delta, many other airlines offer competitively priced options for your trip.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Ontario to Lewiston, Idaho (average of $278). Flying from Ontario to Lewiston, Idaho in July is currently the most expensive (average of $535). 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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Top airline flying from Ontario to Lewiston

Discover the top airline that operate flights from Ontario to Lewiston. 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$485Average$603FlexibilityNo cancel feeOn-timeN/A

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