$69 Find Cheap Flights from San Francisco to Idaho

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Idaho departing on 9/17. 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.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Idaho

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Idaho, 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 San Francisco to Idaho, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Booking Insights
Flights Deals

Cheap Flights from San Francisco to Idaho

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boisenonstop$137
Idaho Falls
Idaho Falls1 stop$241
Hailey
Hailey1 stop$229
Lewiston
Lewiston1 stop$340
Twin Falls
Twin Falls1 stop$577
Pocatello
Pocatello1 stop$407
Spokane
Spokanenonstop$137
Boise
Boisenonstop$137
Idaho Falls
Idaho Falls1 stop$241
Hailey
Hailey1 stop$229
Lewiston
Lewiston1 stop$340
Twin Falls
Twin Falls1 stop$577
Pocatello
Pocatello1 stop$407
Spokane
Spokanenonstop$137

Book Cheap San Francisco to Idaho Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Idaho 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 San Francisco to Idaho

Tue, Sep 9 - Wed, Sep 10
United Airlines Logo
11:06 am - 1:49 pmSFO-BOI
1h 43mnonstop
United Airlines Logo
2:45 pm - 3:35 pmBOI-SFO
1h 50mnonstop
$137United Airlines
Find Deal
Tue, Aug 26 - Sat, Sep 6
Alaska Airlines Logo
11:48 am - 1:56 pmSFO-GEG
2h 08mnonstop
Alaska Airlines Logo
2:36 pm - 4:57 pmGEG-SFO
2h 21mnonstop
$137Alaska Airlines
Find Deal
Wed, Aug 27 - Sat, Aug 30
Hawaiian Airlines Logo
5:14 pm - 7:50 pmSFO-BOI
1h 36mnonstop
Hawaiian Airlines Logo
12:21 pm - 1:10 pmBOI-SFO
1h 49mnonstop
$147Hawaiian Airlines
Find Deal
Wed, Aug 27 - Sat, Sep 6
Alaska Airlines Logo
11:48 am - 1:56 pmSFO-GEG
2h 08mnonstop
Alaska Airlines Logo
2:36 pm - 4:57 pmGEG-SFO
2h 21mnonstop
$147Alaska Airlines
Find Deal
Sat, Aug 23 - Mon, Aug 25
Hawaiian Airlines Logo
6:34 pm - 9:10 pmSFO-BOI
1h 36mnonstop
Hawaiian Airlines Logo
12:43 pm - 1:32 pmBOI-SFO
1h 49mnonstop
$156Hawaiian Airlines
Find Deal
Fri, Aug 22 - Wed, Aug 27
United Airlines Logo
8:50 pm - 11:34 pmSFO-BOI
1h 44mnonstop
United Airlines Logo
9:52 am - 10:50 amBOI-SFO
1h 58mnonstop
$157United Airlines
Find Deal
Sat, Aug 23 - Tue, Aug 26
Southwest Logo
6:50 am - 1:15 pmSFO-GEG
6h 25m1 stop
Southwest Logo
10:45 am - 7:50 pmGEG-SFO
9h 05m2 stops
$162Southwest
Find Deal
Sat, Sep 13 - Thu, Sep 18
Delta Logo
5:35 am - 10:48 amSFO-BOI
4h 13m1 stop
Delta Logo
6:00 am - 8:46 amBOI-SFO
3h 46m1 stop
$177Delta
Find Deal
Wed, Aug 27 - Sun, Aug 31
Delta Logo
5:55 am - 12:41 pmSFO-GEG
6h 46m1 stop
Delta Logo
5:00 am - 9:51 amGEG-SFO
4h 51m1 stop
$177Delta
Find Deal
Fri, Aug 22 - Sun, Aug 24
Southwest Logo
3:50 pm - 12:05 amSFO-BOI
7h 15m1 stop
Southwest Logo
5:25 am - 9:45 amBOI-SFO
5h 20m1 stop
$197Southwest
Find Deal
Booking Insights

KAYAK's insights & trends for San Francisco to Idaho flights

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

What is the cheapest San Francisco to Idaho flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from San Francisco to Idaho.

The cheapest ticket to Idaho from San Francisco found in the last 72 hours was to Boise, at $78 round-trip. The most popular route is from San Francisco (SFO) to Boise (BOI), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $78.

Can I save money by flying with a layover from San Francisco to Idaho?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $457, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from San Francisco to Idaho?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to Idaho, 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 San Francisco to Idaho is April, when tickets cost $217 (return) on average. On the other hand, the most expensive months are December and November, when the average cost of round-trip tickets is $389 and $376 respectively.

What’s the cheapest day of the week to fly from San Francisco to Idaho?

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

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

How far in advance should I book a flight from San Francisco to Idaho?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Francisco to Idaho, 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 San Francisco to Idaho, you should book around 4 weeks before departure, which saves you about 57% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.


Good to know

Low seasonJanuary
Cheapest flight$69
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from San Francisco to Boise

FAQs - booking Idaho flights

  • How does KAYAK find such low prices on flights from San Francisco to Idaho?

    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 San Francisco to Idaho.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from San Francisco to Idaho 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 San Francisco to Idaho?

    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 from San Francisco to Idaho with an airline and back with another airline.

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

    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 from San Francisco to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Idaho?

    The cheapest time of day to fly to Idaho is generally in the afternoon, when round-trip flights cost $278 on average. Morning departures are around 6% cheaper than evening flights, on average. The most expensive time of day to fly to Idaho is generally in the evening, which is peak travel time and where the average cost of a ticket is $299.

Reviews of the top 4 airlines serving from San Francisco to Idaho

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Idaho. 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 San Francisco to Idaho? 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
7.1Food
8.5Crew
7.1Entertainment
8.1Boarding
7.8Comfort
Airline reviews

Delayed flight both ways. Then, on the return flight, we were stuck on the tarmac for at least 30+ minutes. Idk what happened, but this was a bad experience.

2.0 MediocreAnonymous, Jul 2025SFO - BUR
Read more Alaska Airlines reviews

Delayed flight both ways. Then, on the return flight, we were stuck on the tarmac for at least 30+ minutes. Idk what happened, but this was a bad experience.

Great flight, no bumps to speak of, pleasant crew, good inflight entertainment choices

Coffee or tea service would be nice for an evening flight, water or juice not good enough.

this flight had a 7 hour delay due to weather in NYC. It diverted to Pittsburgh for 2 hours then proceeded to NYC. Through it all the crew and flight attendants were terrific. They gave timely information, showed empathy , and were very professional.

Paying for first class and then they want $8:00 for wifi.

fine. only problem,,,, for some,,,,was that many people started trying to exit from the back of the plane,, . lots of irate people. there should be a flight attendant mid plane..to be sure that doesn't happen. The crew up front had no idea what was happening. One big guy started it..then a bunch of others followed his lead. could have gotten ugly... One man stepped in and questioned those rule breakers.. nothing bad happened,,,but......

Big delay of over 7 hours on next leg of trip with Alaska. Would have been nice to have food or something

We were late so that was what was worst part

Flying on Hawaiian Airlines was good. But, getting a boarding pass was a hassle. I booked what I thought was an Alaska Airlines flight that was actually a Hawaiian Airlines flight. I couldn't check in online. I had to wait for the Hawaiian Airlines counter to open so I could get my boarding pass which was a requirement for me to get in The Club or the Centurion Lounge. (I had no check in luggage so I didn't expect to have to physically check in.) The Alaska Airlines staff blamed the FAA for the problem.

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

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

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.

The flight was supposed to leave at 7:30pm, but departed 10:50pm. They kept moving departure time out every half hour. It was a 45 minute flight from n Sunday night with great weather.

Flight got delayed and it was very inconvenient . Had to come with another carrier. Had to spend one more night in San Francisco.

Everything was good for the price I paid. Crew was very nice.

The worst flight experience I've ever had. Our flight was delayed 14 whole hours because the flight crew never showed up. We had to wait in a two hour line to get our new boarding passes, we were told we had no other option but to fly at 10pm (we didn't depart until 11:45pm). Everyone had to contact their hotels and car rental places, workplaces, etc. since we lost an entire day's worth of travel. The crew showed up at 10:15, which was past the time we were supposed to board. They were laughing and being completely smug when they boarded, and they took another hour to board us onto our flight. The flight crew never came to check in on us, we were quickly given one drink and sandwich and they turned off the lights and were negligent the rest of the trip. My mom asked three attendants for a seat belt extender, they never brought one. I was dehydrated and never received another drink. They were very rude and unfriendly, we had been up since 4am the morning of our flight and didn't land in our destination until 2am the next day (5am local time). This was unacceptable service and treatment, these flights are not cheap and we were inconvenienced out of an entire day of travel. This was 100% avoidable and was the fault of Hawaiian Airlines, and their crews inability to show up to work on time.

Loved the leg room, usb charging, outlet, food, staff. The seats were very uncomfortable for some reason and made my buttocks ache and would have liked to be seated together from the time of purchasing tickets without having to pay extra.

I was put in seat 6B with no warning. Had no seat in front of me just sticks out in the aisle so I had to hold what I could and put the rest in a bin way further down.

Usually we have a pleasant trip on HA. Not this time! All stewards were unpleasant, rude, rushed, condescending. First step onto the plane, WE greeted the crew with an “Hello!”. They greeted us with a terse smile then ignored us. Not a good start. Even over the PA announcements, they were rushed and unpleasant. One Stewart even berated a passenger in front of us when all they asked is if the purchase cart had vodka to purchase. The steward said “LIKE WE SAID OVER THE PA, THIS ONLY HAS FOOD OR BEVERAGE!” Vodka is a beverage! It was a legitimate question. Not sure why she treated the passenger this way. Taking trash was even unpleasant, No “Thank you” or at least a smile. I work in CS. I know good CS can make or break your trip. There was absolutely no “aloha” on this trip. All clearly did not want to be on this plane and felt strongly that they did not want to provide a premium service to their clients. This might be our last HA and cancellation of my HA-MC if we are treated the same way going home. We are typically treated with kindness and warmth in the past with HA. This trip was unacceptable.

Overall it was a good flight, but the food should be looked at. No options. The seat was also uncomfortable and very tight.

I was unable to get a check im and get a boarding pass. I tried at the desk of the flight operator Alaska, was told to go to Hawaiian and almost had to go back to Alaskan. In the end inwas told to go thru security and directly to the gate without checking in. It would have been more helpful to have the details rather than walking all over the terminals trying to check in.

The middle name gave us so much issue at check in we had done middle names when booking but Hawaiian/Alaska don’t recognize the middle names and gave us problems at check in. We have never experienced that before.

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Breakfast was not loaded at SFO due to catering company change. Seems like a major airline at a major hub would have thought of something else or warned passengers to pick up food before boarding a 3 hour flight.

Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.

They hired a new catering company the same day of my flight. They botched the job by not delivering the right carts and after THREE HOURS waiting, the flight crew timed out (flight was 19 hours long and FAA rules state crew can’t work more than 14 hours long). So they CANCELED OUR FLIGHT!! Worst experience ever. Avoid UAL at all costs.

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.

Everything you need to know for your flight from San Francisco to Idaho

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.