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Cheap Flights from Boise to Ontario International

Compare Boise to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from Boise to Ontario International

Looking for a cheap last-minute deal or the best return flight from Boise Airport to Ontario International Airport? If you want to travel next month, return fares start from Rs51,285. Find the lowest prices on one-way and return tickets right here.
Ontario.Rs25,966 per passenger.Departing Tue, 13 Oct.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Boise on Tue, 13 Oct, arriving in Ontario International.Price includes taxes and charges.From Rs25,966, select.
Ontario.Rs27,303 per passenger.Departing Wed, 11 Nov.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Boise on Wed, 11 Nov, arriving in Ontario International.Price includes taxes and charges.From Rs27,303, select.
Ontario.Rs27,358 per passenger.Departing Wed, 23 Sep.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Boise on Wed, 23 Sep, arriving in Ontario International.Price includes taxes and charges.From Rs27,358, select.
Ontario.Rs31,457 per passenger.Departing Thu, 10 Dec.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Boise on Thu, 10 Dec, arriving in Ontario International.Price includes taxes and charges.From Rs31,457, select.
Ontario.Rs34,547 per passenger.Departing Sun, 30 Aug.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Boise on Sun, 30 Aug, arriving in Ontario International.Price includes taxes and charges.From Rs34,547, select.
Ontario.Rs35,371 per passenger.Departing Fri, 2 Oct.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Boise on Fri, 2 Oct, arriving in Ontario International.Price includes taxes and charges.From Rs35,371, select.
Ontario.Rs60,177 per passenger.Departing Sat, 3 Apr.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Boise on Sat, 3 Apr, arriving in Ontario International.Price includes taxes and charges.From Rs60,177, select.
Ontario.Rs93,333 per passenger.Departing Tue, 30 Mar.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Boise on Tue, 30 Mar, arriving in Ontario International.Price includes taxes and charges.From Rs93,333, select.
Ontario.Rs158,975 per passenger.Departing Sun, 16 Aug.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Boise on Sun, 16 Aug, arriving in Ontario International.Price includes taxes and charges.From Rs158,975, select.

Find the cheapest month to fly from Boise to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Boise to Ontario International flights are currently cheapest in October.
Aug
from Rs34,605
Sep
from Rs27,404
Oct
from Rs26,010
Nov
from Rs27,349
Dec
from Rs31,510
Jan
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Feb
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Mar
from Rs93,490
Apr
from Rs60,278
May
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Jun
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Jul
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Direct flights from Boise to Ontario International

Boise to Ontario International: Alternative routes

Compare routes from Boise to Ontario below. You may find an airport to fly into that's cheaper, faster, or easier than Ontario International.

Ontario International

4km from central Ontario
Closest
from Rs26,010
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San Bernardino Norton AFB

39km from central Ontario
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Santa Ana John Wayne

48km from central Ontario
Cheapest
from Rs18,024
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Long Beach Municipal

54km from central Ontario
from Rs30,018
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Hawthorne

65km from central Ontario
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Burbank

67km from central Ontario
from Rs18,301
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Los Angeles International

71km from central Ontario
from Rs20,524
Search flights

Boise to Ontario: Flight information

The things to know before you go.
Cheapest flight foundRs26,010
Cheapest month to flyOctober
Average flight time2 hrs, 11 mins
Most popular airlineAlaska Airlines
Average flights per week16

Finding cheap flights from Boise to Ontario International: Frequently asked questions

The best price we found for a return flight from Boise to Ontario International is Rs51,372. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
2 hours and 11 minutes is the average flight time from Boise to Ontario International.
Alaska Airlines, Horizon Air and SkyWest Airlines fly direct from Boise to Ontario International.
As of August 2026, there are 16 flights per week flying from Boise to Ontario International.
The cheapest month to fly from Boise to Ontario International is usually September.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Boise Airport to Ontario International Airport on Wednesday, 16 September 2026.
Yes – the average flight time is 2 hours and 11 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Ontario International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Ontario is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, Alaska Airlines offers the cheapest flight tickets to Ontario International.

Flying from Boise Airport (BOI) to Ontario International Airport (ONT): what you need to know

  • Take a direct flight from Boise Airport to Ontario International Airport and you'll be travelling for an average of 2 hours 10 minutes.

  • The timezone in Ontario is UTC-8, which is one hour behind Boise.

  • You can choose from six weekly Boise Airport to Ontario International Airport flights.

  • Get to the airport on time so you don't miss your BOI to ONT flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid a last-minute sprint to the gate.

  • Flying during a peak time such as October? Public holidays and other high seasons can lead to longer lines at airport checkpoints. Play things extra safe and arrive up to four hours ahead of an international flight and two hours before a domestic departure.

  • Alaska Airlines has direct flights from Boise Airport to Ontario International Airport. Book with this popular carrier, then get ready to check out the sights in Ontario — and maybe even more of the United States if time allows.

  • The airline that tops the list for bookings on this route is Alaska Airlines.

  • If you want to explore another city along the way, simply uncheck 'Direct flights only' when searching for your ticket from Boise Airport to Ontario International Airport. Here are the most popular stopovers between BOI and ONT:

    • Phoenix Sky Harbour Airport

    • Harry Reid International Airport

    • Salt Lake City Airport

How to find the cheapest flights from Boise Airport (BOI) to Ontario International Airport (ONT)

  • The lowest price we've found for a one-way Boise Airport to Ontario International Airport flight is Rs26,010. A return plane ticket is currently Rs51,372. Depending on the availability and when you book, these fares can change.

  • It's usually smart to book as early as possible if you're hoping to get cheap tickets from BOI to ONT. That's because flight prices are based on demand, which tends to rise closer to departure.

  • If you're willing to be flexible with your travel dates, try using the 'Whole month' search function. It'll find the lowest price in each month when searching for your flight from Boise Airport to Ontario International Airport.

  • There's no need to check back in every day to see if fares have gone down when you set up a Price Alert. We'll update you the moment there's a new deal on cheap flights from BOI to ONT.

  • Find the ideal flight for you by using the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from Boise Airport to Ontario International Airport, use the 'Sort by' tool. You can also filter results by airline, departure and arrival times, and number of stops.

Handy information about Boise Airport (BOI)

  • You'll find BOI at 3201 Airport Way.

  • 84% of flights departing from Boise Airport land at their destination on time. Given its strong performance rating, you're unlikely to face delays when flying out of BOI.

  • Central Boise to Boise Airport is around 6 kilometres. Depending on traffic, it'll take you about 15 minutes to get there if you're driving, catching a taxi or ride-sharing.

  • Expect a trip time of about 30 minutes on public transport.

  • Catching an early flight from Boise Airport to Ontario International Airport? Avoid the stress of rushing to the airport (and sneak in some extra precious sleep) by choosing one of these stays near BOI:

Arriving at Ontario International Airport (ONT)

When to fly to Ontario International Airport (ONT)

  • July is the most popular month for flights from Boise Airport to Ontario International Airport. To skip the crowds, go to Ontario in March.

  • Lock in your flight from Boise Airport to Ontario International Airport for August if you'd like to explore Ontario during its warmest month. Expect temperatures of between 16ºC and 36ºC.

  • If you want to travel in cooler conditions, look for a cheap ticket from BOI to ONT in February. Average temperatures are between 4ºC and 24ºC then.

Explore more of the United States

  • Los Angeles is just one of the many cities in the United States waiting to be discovered after you've experienced Ontario. Around 56 kilometres away to the west, its top attractions include Hollywood Sign, Universal Studios Hollywood and Hollywood Bowl.

  • If you're interested in discovering another well-known destination in the United States, head for San Diego, about 153 kilometres south of Ontario. San Diego Zoo, San Diego Balboa Park and USS Midway Museum are key highlights.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.