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$345+ 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 3/14. Fares are subject to change and may not be available on all flights or dates of travel.
LWS — ONT
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This Delta deal was found by Cheapflights users on 1/27. 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 3/146:10 am
LWS
-
ONT
1 stop5h 07m
Delta
Mon 3/165:53 pm
ONT
-
LWS
1 stop5h 07m
Delta
Deal found 1/27$345

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$345
(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 January 29, 2026.
Use the filters below to find and compare flights from Lewiston to Ontario that are best for you.

Fly from

Lewiston

Fly to

Ontario

Route

Depart

Return

Price

LewistonOntario

LWS - ONT

LWSONT

Lewiston Nez Perce Rgnl

Sat 3/14

6:10 am-11:17 am

1 stop5h 07m

Ontario

Mon 3/16

5:53 pm-11:00 pm

1 stop5h 07m

$345

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

  • 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 $46). 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.

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 January 29, 2026.
Get a feel of what it's like to fly with Delta from Lewiston 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
7.9
Good
8,128 reviews

Comfort

7.9

Entertainment

7.8

Food

7.2

Boarding

8.1

Crew

8.5

Overall

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
7.9
Good
8,128 reviews
Delta
7.9
Good
8,128 reviews

Comfort

7.9

Entertainment

7.8

Food

7.2

Boarding

8.1

Crew

8.5

Overall

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 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 5h 07m. Delta provides one of the quickest options available for as low as $345. 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 $46). 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.

See more FAQs

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Top airline flying from Lewiston to Ontario

Discover the top airline that operate flights from Lewiston 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$274Average$426FlexibilityNo cancel feeOn-timeN/A

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