$86 Find Cheap Flights from San Francisco to Idaho - Compare and Save

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 9/16. 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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Cheap Flights from San Francisco to Idaho

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boise1 stop$207
Idaho Falls
Idaho Falls1 stop$195
Hailey
Hailey1 stop$333
Lewiston
Lewiston1 stop$402
Twin Falls
Twin Falls1 stop$316
Pocatello
Pocatello1 stop$307
Spokane
Spokane1 stop$215
Boise
Boise1 stop$207
Idaho Falls
Idaho Falls1 stop$195
Hailey
Hailey1 stop$333
Lewiston
Lewiston1 stop$402
Twin Falls
Twin Falls1 stop$316
Pocatello
Pocatello1 stop$307
Spokane
Spokane1 stop$215

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

Thu, Sep 17 - Mon, Sep 21
Multiple Airlines Logo
10:24 pm - 12:04 pm
SFO
-
IDA
12h 40m
1 stop
Multiple Airlines Logo
6:21 pm - 8:14 am
IDA
-
SFO
14h 53m
1 stop
$195Multiple Airlines
Thu, Sep 17 - Mon, Sep 21
Multiple Airlines Logo
10:24 pm - 12:04 pm
SFO
-
IDA
12h 40m
1 stop
Multiple Airlines Logo
6:21 pm - 8:14 am
IDA
-
SFO
14h 53m
1 stop
$196Multiple Airlines
Tue, Sep 1 - Wed, Sep 2
United Airlines Logo
4:30 pm - 7:24 pm
SFO
-
BOI
1h 54mnonstop
United Airlines Logo
7:05 pm - 7:58 pm
BOI
-
SFO
1h 53mnonstop
$207United Airlines
Wed, Aug 26 - Wed, Sep 2
United Airlines Logo
4:30 pm - 7:24 pm
SFO
-
BOI
1h 54mnonstop
United Airlines Logo
7:05 pm - 7:58 pm
BOI
-
SFO
1h 53mnonstop
$207United Airlines
Sat, Oct 10 - Sun, Oct 11
Alaska Airlines Logo
7:03 am - 1:47 pm
SFO
-
BOI
5h 44m
1 stop
Alaska Airlines Logo
8:57 am - 9:55 am
BOI
-
SFO
1h 58mnonstop
$207Alaska Airlines
Tue, Oct 6 - Sun, Oct 11
Alaska Airlines Logo
4:21 pm - 11:59 pm
SFO
-
BOI
6h 38m
1 stop
Alaska Airlines Logo
8:57 am - 9:55 am
BOI
-
SFO
1h 58mnonstop
$207Alaska Airlines
Tue, Oct 6 - Sat, Oct 10
Delta Logo
6:00 am - 12:16 pm
SFO
-
BOI
5h 16m
1 stop
Delta Logo
5:14 pm - 10:22 pm
BOI
-
SFO
6h 08m
1 stop
$207Delta
Sat, Aug 29 - Mon, Aug 31
Delta Logo
10:36 am - 5:00 pm
SFO
-
GEG
6h 24m
1 stop
Delta Logo
5:40 pm - 11:50 pm
GEG
-
SFO
6h 10m
1 stop
$227Delta
Tue, Sep 8 - Tue, Sep 15
American Airlines Logo
8:08 am - 2:09 pm
SFO
-
GEG
6h 01m
1 stop
American Airlines Logo
1:53 pm - 7:11 pm
GEG
-
SFO
5h 18m
1 stop
$227American Airlines
Tue, Oct 13 - Tue, Oct 20
American Airlines Logo
7:05 am - 5:26 pm
SFO
-
JAC
9h 21m
1 stop
American Airlines Logo
5:59 pm - 10:59 am
JAC
-
SFO
18h 00m
1 stop
$435American Airlines
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.

How much is a round-trip flight from San Francisco to Idaho?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Francisco to Idaho departing in September.

Flight prices are below average for this route right now.

Flights to Idaho from San Francisco usually cost between $223 and $347 in September.
The lowest price found in the past 5 days was $207 on Alaska Airlines (Sep 15-Sep 23).

What is the cheapest San Francisco to Idaho flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Idaho from San Francisco found in the last 5 days was to Boise, at $158 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 5 days was $158.

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

The average price for all round-trip flights from San Francisco to Idaho depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Idaho is generally at night, when round-trip flights cost $304 on average. Morning departures are around 9% 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 $337.

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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $376 on average.

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 November, when tickets cost $240 (return) on average. On the other hand, the most expensive months are July and December, when the average cost of round-trip tickets is $448 and $436 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 Monday, as it's usually the priciest day. When flying back from Idaho, Thursday 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 56% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Good to know

Low season

January

Cheapest flight

$86
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly with an average 16% increase in price.
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.

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.
7.9
Alaska AirlinesOverall score based on 12730 reviews
8.5Crew
7.0Food
7.0Entertainment
8.1Boarding
7.8Comfort
Airline reviews

The plane was freezing. A few other customers mentioned how they can’t get their temperature right on their flights lately.

6.0 GoodKatherine, Jul 2026
SFO - SNA
Read more Alaska Airlines reviews

The plane was freezing. A few other customers mentioned how they can’t get their temperature right on their flights lately.

The food was fine, I was in economy so wasn’t expecting more. Would have liked an entree like pasta/lasagna. Entertainment/movies were ok. I have Apple TV & HBO so I was searching for new releases. But these are just my preferences for food & entertainment. The flight was good. I like the design of your seat backs/tray tables with the extra cup holder and screen holders

Quick, easy, on time. I couldn't ask for more great staff

The app booked me on a flight for July 1st as opposed to August 1st like it was supposed to be. No problem with Alaska Airlines, except they took a while to refund my money. But it was as taken instantly. So, yeah.

Not able to get boarding pass for domestic connection flight when check in at international airport. I was told I need to get connection flight boarding pass after I entered US. It us very inconvenient.

They called me 2 hours before my original flight from SFO was to depart to let me know it was delayed and that I would miss my connection. They then rebooked on a different flight leaving a half hour earlier to a different connecting airport, so that I would not miss my connection. It all worked out and I arrived at my destination without a problem and 15 minutes earlier than the original flight would have. Nice!

The flight would have been very good , if not dor the constantly screaming baby in the row behind me. Is there a way to isolate people traveling with infants? This is not the first time this has happened to me.

They treat me well because of my one world status. Crew is attentive and professional. One of the best airlines out there.

Crew were bad Didn’t help with luggage When asked for a glass of wine, I was told that they will serve later , which they didn’t to Me and didn’t serve anyone else in First class . Didn’t offer any snacks , Chips or Nuts to anyone . Flight was not crowded either. Worst Service/ or No Service !

Flight crew and flight were good. But it departed two hours late.

Crew was absolutely fantastic and we’re so welcoming and friendly ❤️

Flight delayed four separate times. I’m now one hour hours late to landing.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

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

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

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

No charging outlets worked. Other than collecting trash attendants didn’t come around. No one could hear flight attendants announcements during the flight. Seat pads were horrible. Sitting on a board for 5 hours. What happened to Hawaiian airlines comfort, hospitality, and extras? Our pilots did an excellent job trying to minimize turbulence and incredible job in landing in windy conditions.

I received several emails about my 3:10 flight. When I showed up to the airport at 12:30 to check my bags I was told the flight was actually at 1 pm. They grudgingly rebooked me for a flight at 5:22 to Vegas to get a connecting to LAX. I did find the gate for my original 3:10 flight but they were booked. I proceeded to receive status updates and gate change information for the 3:10 flight, even though I was apparently never supposed to be on that flight

The food options were limited and very specific. Some type of entertainment option for a 4.5 hour flight would have been nice.

Kayak sold me a ticket after check in time. Could not check in. Could not get on flight.

I could not believe that on a 5 hour plus flight we were not given a complimentary meal . That should be illegal. Or it would be nice to be informed beforehand that a complimentary meal would not be provided. The wording in the email I got about pre ordering food was phrased in a way that made the food seem like it would be free. Very misleading! Also during boarding we were informed there would be empty seats we could move to if we wanted, all we had to do was wait for an announcement, however an announcement was never made. Then when we tried to change seats ourselves we were singled out over the loud speaker and told we could not move without asking. Then the flight was about to take off , so we didn’t have time to ask . Then we were told we could not move to the exit row because you had to pay for those seats, but we were not told where we could move. Also no one was in the exit rows so , if something happened no one would be there to assist the passengers. Also people should be allowed to move there if the airline wasn’t able to sell them. One passenger asked if he could pay for the upgrade and the flight attendant said she did not have the capability to charge for the seat on her mobile device, so the airline ended up losing possible income anyways . So why not let people move there during flight if you have no way to charge them? Then the landing was bumpy and awful and many passengers complained out loud when we landed .

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.

Thanks to the supervisor Jose my pregnant wife and our family will not miss a very important ultrasound tomorrow. What he did was simply heroic. He needs to be promoted and praised. Please tell him our family appreciates him so so much!

Flight was canceled with no voucher of any kind and next available flight was two days later.

On time. Alaska upgraded seat comfort with memory foam seat covers with head rests

It was a short, comfortable flight. It did leave an hour late due to the pilot having to be replaced (family emergency) but that didn’t inconvenience myself & my friend. The situation was explained, eventually.

Lost one piece of luggage even though I checked in 2.5 hours before the flight

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

My service dog and I were asked to deplane just before they closed the door - clearly very last minute they couldn’t find the documentation that I have filled out many many times before that is for flying service animals. I purposely purchase 3seats (a whole row) since he is large and not all passengers want to sit next to a dog on a cross country flight. The plane departed with my husband on it!!! They made me fill out a hard copy of the same form and had to reschedule me on a later flight where they could find 3 seats together!! I’ve done this so many times before - clearly the error was on their part in a technology glitch - but really people - do better!! Very traumatic - and my husband had to wait for us when he landed ….so bad. Poor pup was confused and tired.

No screens or meal options. Freezing cold. Dirty seats. Left late.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

It was perfect! I've never flown with United before, but I definitely will in the future

They delayed the flight from 9:00 to 11:55 At 11:45 they canceled the flight. I paid a premium price for the tickets with poor service

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

Information on your arrival and departure airports