ONT - BOI

$106 Find Cheap Flights from Ontario to Boise

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Boise departing on 10/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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KAYAK searches hundreds of travel sites at once for deals on flights to Boise

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Boise, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Boise, as well as popular online travel agencies
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Cheap Flights from Ontario to Boise (ONT-BOI)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Boise that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Boise

Wed, Oct 29 - Sun, Nov 2
Frontier Logo
12:59 am - 11:43 amONT-BOI
9h 44m1 stop
Frontier Logo
12:53 pm - 9:51 amBOI-ONT
21h 58m1 stop
$210Frontier
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Wed, Sep 3 - Fri, Sep 5
Alaska Airlines Logo
3:04 pm - 10:40 pmONT-BOI
6h 36m1 stop
Alaska Airlines Logo
6:35 am - 10:44 amBOI-ONT
5h 09m1 stop
$246Alaska Airlines
Find Deal
Thu, Oct 16 - Mon, Oct 20
Alaska Airlines Logo
6:00 am - 2:35 pmONT-BOI
7h 35m1 stop
Alaska Airlines Logo
5:38 pm - 11:59 pmBOI-ONT
7h 21m1 stop
$254Alaska Airlines
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Thu, Jun 12 - Sun, Jun 15
Delta Logo
9:44 am - 5:13 pmONT-BOI
6h 29m1 stop
Delta Logo
5:40 am - 8:52 amBOI-ONT
4h 12m1 stop
$261Delta
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Sat, Jun 28 - Sat, Jul 5
Delta Logo
5:50 pm - 11:59 pmONT-BOI
5h 09m1 stop
Delta Logo
5:15 am - 10:25 amBOI-ONT
6h 10m1 stop
$288Delta
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Sun, Jun 15 - Tue, Jun 17
Southwest Logo
6:15 pm - 1:40 amONT-BOI
6h 25m1 stop
Southwest Logo
6:55 am - 12:10 pmBOI-ONT
6h 15m1 stop
$294Southwest
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Sun, Jun 15 - Fri, Jun 20
Southwest Logo
8:45 pm - 1:40 amONT-BOI
3h 55m1 stop
Southwest Logo
6:25 pm - 9:25 pmBOI-ONT
4h 00m1 stop
$301Southwest
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Sat, Jun 14 - Tue, Jun 17
 Logo
12:59 am - 11:47 amONT-BOI
9h 48m1 stop
 Logo
6:25 am - 11:05 amBOI-ONT
5h 40m1 stop
Sun, Jun 15 - Tue, Jun 17
United Airlines Logo
6:32 pm - 1:32 pmONT-BOI
18h 00m1 stop
United Airlines Logo
6:30 am - 12:31 pmBOI-ONT
7h 01m1 stop
$437United Airlines
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Thu, Jul 3 - Sun, Jul 6
United Airlines Logo
6:39 pm - 9:46 amONT-BOI
14h 07m2 stops
United Airlines Logo
7:51 am - 12:14 pmBOI-ONT
5h 23m1 stop
$556United Airlines
Find Deal
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KAYAK's insights & trends for Ontario to Boise flights

Get data-powered insights and trends into flights from Ontario to Boise to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Ontario to Boise?

The average price of all round-trip flights from Ontario to Boise clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Ontario to Boise, look for departures on Thursdays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from Boise, Tuesday is the cheapest day to fly and Sunday is the most expensive.

What is the cheapest month to fly from Ontario to Boise?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Boise, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Boise is January, where tickets cost $240 (return) on average. On the other hand, the most expensive months are December and March, where the average cost of round-trip tickets is $416 and $346 respectively.

How far in advance should I book a flight from Ontario to Boise?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Boise, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ontario to Boise, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$106
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly with an average 6% increase in price.
Flight from Ontario to Boise

When to book flights from Ontario to Boise

Are your dates flexible? Find out the best times to travel from Ontario to Boise based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Boise

  • What seat selection options are available on Alaska Airlines flights from Ontario to Boise?

    Alaska Airlines provides several seat selection options to its passengers. Preferred Seats provide passengers with extra legroom and are located near the front of the cabin. Alaska Airlines also offers premium class seats that provide passengers with more space, wider seats, and additional amenities. Exit Row Seats provide extra legroom, and passengers must meet specific safety requirements to sit in an exit row. Exit row seats are available for purchase for an additional fee.

  • What services does United Airlines offer Economy Class passengers on flights from Ontario to Boise?

    United Airlines provides several services and amenities to its Economy Class passengers on flights. Passengers can enjoy a selection of movies and are offered a complimentary snack and beverage. United offers in-flight Wi-Fi on most of its flights for a fee or through a pre-purchased package. The airline also offers complimentary access to Wi-Fi messaging.

  • What is the luggage allowance on American Airlines flights from Ontario to Boise?

    American Airlines' luggage allowance policy varies depending on the ticket class and frequent flyer status. Basic Economy passengers are only allowed to bring one personal item on board and are not permitted to bring a full-size carry-on bag. Main Cabin passengers are allowed to bring one carry-on bag and one personal item on board and one checked bag for a fee.

  • How do I get from Boise Airport (BOI) to the city center?

    Taxis are available at BOI airport and can take you to the city center in about 10-15 minutes. The cost can vary, but it is usually around $15-$20. Companies like Uber and Lyft are available at the airport and can take you to the city center. The cost and duration of the ride can vary depending on traffic conditions. The Valley Regional Transit (VRT) operates several bus routes in the Boise area, including a route that stops at the airport. The route 10 bus can take you to Downtown Boise from the airport. The cost of the ride is $2, and the duration is about 35-45 minutes.

  • What is the cheapest flight from Ontario to Boise?

    In the last 3 days, the lowest price for a flight from Ontario to Boise was $106 for a one-way ticket and $210 for a round-trip.

  • Do I need a passport to fly between Ontario and Boise?

    No, a passport isn't needed to fly from Ontario to Boise. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Ontario to Boise?

    Ontario airport is called Ontario and the only airport in Boise is Boise Air Term. Gowen Fld.

  • Which aircraft models fly most regularly from Ontario to Boise?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Boise?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Ontario and Boise, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to Boise, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Ontario to Boise are Southwest and Delta. With an average price for the route of $343 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $301 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Ontario to Boise?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Boise.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Boise?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boise from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Boise?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Boise with an airline and back to Ontario with another airline. Booking your flights between Ontario and BOI can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Boise?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Boise from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Ontario to Boise

  • Flights from Ontario to Boise have layovers in different cities depending on the airline. Some of them include Phoenix (PHX), Salt Lake City (SLC), San Francisco (SFO), and Seattle (SEA).
  • United Airlines provides assistance to passengers with reduced mobility on flights from Ontario to Boise. Passengers can request assistance from airport staff to help them navigate between terminals and on board.
  • American Airlines uses Terminal 4 at Ontario International Airport (ONT) for flights to Boise. It is important to note that the terminal may change, so it is recommended to check at the information desks before the flight.
  • Delta Airlines is working to optimize its operations to reduce fuel burn and emissions. This includes reducing taxi time, optimizing flight routes, and improving the efficiency of ground operations even for flights from Ontario to Boise.
  • Southwest Airlines offers several services to families with kids on flights from Ontario to Boise. The airline provides an unaccompanied minor service to children between the ages of 5 and 11 years old and a family boarding process where a family with children aged 6 or under will find seats together.

Top 5 airlines serving from Ontario to Boise

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Boise. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Boise? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 10000 reviews
7.9Comfort
7.1Entertainment
8.5Crew
8.2Boarding
7.1Food
Airline reviews

Wish I got An email stating that I needed to check in at hawaiian even if I made my ticket thru alaska. I had to walk to terminal A from Terminal B.

10.0 ExcellentAnonymous, May 2025SJC - HNL
Read more Alaska Airlines reviews

Wish I got An email stating that I needed to check in at hawaiian even if I made my ticket thru alaska. I had to walk to terminal A from Terminal B.

Awesome just like that we have a timeline flying Alaska.

Great, overall. Thicker seat cushion would be nice. My butt hurt the whole flight.

Thicker seat cushion would be nice. My butt hurt the whole flight.

All good! No entertainment on this new plane yet but ok for this short flight. Great on time flight! Thanks

These questions are hard to answer. It was not until I checked in that I learned my flight was going to Seattle for a connection and not Portland. I did not get notified, or asked, about this change by Alaska or Kayak. Thankfully I made this flight; but missed the connecting flight and it took me much longer to get home. A service representative for Alaska says this happens frequently with third party companies, like Kayak. Please please figure that out.

Delayed flight due to mechanical issues. You only serve water or apple juice which is pathetic. To get to connecting flight you need to take a train so dumb. All in all it’s certainly not about the customer is it? You make that perfectly clear. It’s the last time I fly with you no matter how cheap your fares are!

My youngest didn't have a assigned seat until we biard6the plane.

I got the last seat on the plane, in the back in the corner against the window, and I paid a competitive price for my ticket several weeks before the flight.

Long delay before boarding. By the time I was informed of the delay I was already at the gate.

It was a perfect flight in all aspects! Both legs!

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.

Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.

I recently flew Southwest from San Jose to Honolulu. I was very impressed with the flight crew, especially the flight attendant in charge of the front of the plane. She came through the aisle at least five times for drinks and water, and two times for snacks. I have not seen such service since I flew first class. Also, for the first time, they gave us the correct baggage claim number, and the luggage came out quickly. I can't wait for Southwest to have assigned seating! I absolutely hate the Cattle Call boarding procedure and the mad dash to get seats and overhead bins. However, the boarding was efficient.

We had a nice flight. Boarding was easy, our seats were comfortable and the on board service was pleasant.

Service was great, boarding and exiting went smoothly, and the flight was very pleasant.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a hell hole of an airport. It is the new LaGuardia. Everything Cobbled together. Security gates closed. Terri directional signage

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

Delta flight was on time, seats were comfortable, and crew was nice.

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

New boarding doesn't make sense. Filling front first is slow.

Delta flight was great from the check in all the way to arrival. However, I had a very bad experience. I requested a wheelchair and the wheelchair employee that went to pick me up from the plane in Boston to bring me to the baggage claims told me I have to pay him. I was under the impression that it was a free service and I usually give tips but the person forced me to pay and since I said no because I was upset with his demand when my daughter walked in to pick me up he demanded payment from my daughter who paid him thinking maybe now it is a charged service.

Horrible. Grateful to be alive but spent 13 hours at airport only to return back to my familys house and flight changed to next day. They tried to fix a part on plane, had no back up plane and after 10 hours , reattempted the flight and it STILL wasn't fixed. We got a meal voucher and rescheduled flight but there should be some other compensation for the 15 hours spent in airport

The personnel were professional and friendly. The Boeing 737 Max 9 is too claustrophobic and was very warm at both airport gates, and still warm in the air.

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

get E+, a must for 5 hours flight if you are tall

The first flight was better in terms of the aircraft.

The gate was too far away for the connecting flight

Compared with other carriers business class for an overnight was not worth the extra expense.

Easy to board. Flight was super crowded though so I didn't sleep well on that cross country red-eye flight. The aisles seem ot have gotten narrower and the seat smaller whn luggage and people are getting bigger so it would be AWESOME to have more space and breathing room in general ;)

Pilot Erika DeLong made us feel safe and at ease in a frankly scary time to be flying. Her warm smile and greeting and excellent command of the aircraft in foggy bumpy weather helped us all to calm our nerves and get us home safely.

Plenty of room for me and the cat in Premium Economy. Seat was comfortable. Boarding was a breeze. The lady at the special check-in desk was great, super helpful and professional.

Wish movie and music choices changed more often. Mostly same from a month or two ago when I last flew.

Spirit is by far the worst airline to travel with, period. Seats are cardboard, flight attendants need anger management and if you ask for water, you’re basically a criminal. I don’t care how much it costs but I will travel with an airline who actually cares about their customers. Oh and one more thing, the next time your gate agent puts his foot on someone’s baggage's scale, I hope they get what’s coming next, a viral video of your scams. You suck Spirit, do better.

I mean, it’s Spirit. But it was frustrating to have our flight canceled, get bumped to a later flight, and then Spirit was unwilling to check our bag until 4 hours before our flight… tell us we could not sit in the waiting area’s chairs… and really negative experience getting checked in and dropping the bag.

terrible service, no room for a dog underfoot, a broken chair that is impossible to sit on and all this costs a lot of money

It was fast but uncomfortable seats. Had to pay a bit extra not sure why? Maybe in selection of all my 4 tix together ? Just knew I had a balance before getting boarding pass online when departing from satx ? And flight was delayed..

Last minute 2-3 hr delay in flight schedule; no explanation Unexpected extra $52 charge What's the benefit of choosing a cheap airline if you trick people last minute and force them to pay extra last minute? Did not appreciate being cornered.

Seats are uncomfortable and too close together. Also, you missed my connection in Vegas on the way back and I ended up sleeping in the airport, flying back to Burbank instead of LAX and I got home 12 hours late.

Surprising everything went well. Nice attendants and fast getting on and off the plane. Overall, was happy with the experience.

Non-professional acting crew, Very uncomfortable seats…!! Very bad pricing with all the add-ons for seat choice, luggage fees, etc….soon you’ll charge extra for oxygen. The ticket price means Nothing because in the end, the actual amount i paid, i could have and will in the future continue to fly on a real airline…

With this price, I shouldn't complain on anything. I understand I have to pay for every services they provide. The plane could smell a little better. Advise them to use frebeeze to freshen up the interior a little bit.

Terrible. 1st and last flight on Spirit. Check in process was a nightmare. Despite arriving 1.6 hours before flight we had to be pulled from the ridiculously long line to “self check” our bags which took 10 min and required assistance. Seats are very uncomfortable , don’t move, no pockets, no entertainment, no wifi Basically like taking a time capsule back to the 70s. No thank you.

Everything you need to know for your flight from Ontario to Boise

Information on your arrival and departure airports

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