$79 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 10/6. 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
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Best Idaho Flight Deals from San Francisco

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boisenonstop$157
Idaho Falls
Idaho Falls1 stop$244
Hailey
Hailey1 stop$234
Lewiston
Lewiston1 stop$401
Twin Falls
Twin Falls1 stop$406
Pocatello
Pocatello1 stop$417
Spokane
Spokanenonstop$137
Boise
Boisenonstop$157
Idaho Falls
Idaho Falls1 stop$244
Hailey
Hailey1 stop$234
Lewiston
Lewiston1 stop$401
Twin Falls
Twin Falls1 stop$406
Pocatello
Pocatello1 stop$417
Spokane
Spokanenonstop$137

Cheap Flights from San Francisco to Idaho

 
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

Wed, Aug 20 - Sat, Aug 23
United Airlines Logo
8:25 am - 10:38 amSFO-GEG
2h 13mnonstop
United Airlines Logo
12:35 pm - 3:02 pmGEG-SFO
2h 27mnonstop
$137United Airlines
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Sat, Oct 18 - Mon, Oct 20
Alaska Airlines Logo
10:53 am - 1:04 pmSFO-GEG
2h 11mnonstop
Alaska Airlines Logo
1:44 pm - 4:03 pmGEG-SFO
2h 19mnonstop
$147Alaska Airlines
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Wed, Aug 20 - Sat, Aug 23
Hawaiian Airlines Logo
8:00 am - 12:43 pmSFO-GEG
4h 43m1 stop
Hawaiian Airlines Logo
4:35 pm - 9:20 pmGEG-SFO
4h 45m1 stop
$156Hawaiian Airlines
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Tue, Aug 5 - Thu, Aug 14
Alaska Airlines Logo
2:30 pm - 5:04 pmSFO-BOI
1h 34mnonstop
Alaska Airlines Logo
1:00 pm - 1:49 pmBOI-SFO
1h 49mnonstop
$157Alaska Airlines
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Wed, Aug 20 - Sat, Aug 23
Southwest Logo
5:15 am - 11:20 amSFO-GEG
6h 05m1 stop
Southwest Logo
12:10 pm - 7:50 pmGEG-SFO
7h 40m2 stops
$162Southwest
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Thu, Aug 21 - Sat, Aug 23
Delta Logo
5:55 am - 10:34 amSFO-GEG
4h 39m1 stop
Delta Logo
1:21 pm - 8:06 pmGEG-SFO
6h 45m1 stop
$167Delta
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Thu, Aug 21 - Sat, Aug 23
Southwest Logo
2:20 pm - 11:10 pmSFO-GEG
8h 50m2 stops
Southwest Logo
3:05 pm - 9:25 pmGEG-SFO
6h 20m1 stop
$172Southwest
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Sat, Aug 9 - Mon, Aug 11
Hawaiian Airlines Logo
2:00 pm - 4:07 pmSFO-GEG
2h 07mnonstop
Hawaiian Airlines Logo
4:47 pm - 7:09 pmGEG-SFO
2h 22mnonstop
$175Hawaiian Airlines
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Thu, Jul 31 - Wed, Aug 6
Delta Logo
5:55 am - 1:16 pmSFO-BOI
6h 21m1 stop
Delta Logo
7:45 pm - 12:19 amBOI-SFO
5h 34m1 stop
$197Delta
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Tue, Jul 15 - Fri, Aug 15
United Airlines Logo
4:50 pm - 7:57 pmSFO-JAC
2h 07mnonstop
United Airlines Logo
7:50 am - 9:15 amJAC-SFO
2h 25mnonstop
$209United Airlines
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Useful Info

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 $138 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 $138.

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 $479 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 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 $382 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. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.


Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$79
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 3% 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.

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

    The cheapest time of day to fly to Idaho is generally in the morning, when round-trip flights cost $282 on average. Morning departures are around 4% cheaper than evening flights, on average. The most expensive time of day to fly to Idaho is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $299.

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
8.1Boarding
7.8Comfort
8.5Crew
7.1Entertainment
Airline reviews

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

8.0 ExcellentAnonymous, May 2025SFO - JFK
Read more Alaska Airlines reviews

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

No non-alcoholic drinks available except water and small apple juice cans.

The flight was delayed over two and a half hours thus causing me to miss my best friend’s funeral. All because the flight crew had to get more rest. That was the reason stated. I understand however very unfortunate. Glad everyone is well rested and resting in peace.

All good except both the outbound and return flights were delayed about 1 1/2 hrs.

Not great. My flight was canceled due to a mechanical problem and I could not get rebooked for the same day. I needed to get to my destination yesterday, not today. I was able to book with another airline but it was a layover and ultimately a 1 hour flight took me 12 hours. Normally I like Alaska much more than Southwest, but Southwest came through with a not terrible price for same day.

The plane was late arriving. The Alaska people did a great job of turning it around quickly and getting us off. We took off about 35 minutes after it reached the gate.

I liked the flight attendant named Tyler. He was charismatic and genuine. I like the pilot in my second flight, he was considerate to everyone’s feelings. I liked the people I sat beside. I like the plane size. I like Alaska airlines

Flight delay was inconvenient and exhausting getting in at 1 am. However the crew and lounge was very comfortable.

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.

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

Both flights were late 2+ hours with ZERO communication from the airlines or their staff. No offers for compensation. WiFi didn’t work for streaming and they said to only use browsing but that didn’t work either. Waste of $$. No drinks only boxed water or apple juice. No snack. One of the worst flight experiences I’ve ever had.

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

It was very pleasant. The staff and crew are very polite.

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

There were several delays and we were stressed about making our connection. The announcements for boarding were hard to hear or understand. The seating was uncomfortable for a 6 hour flight.

When I was not allowed by Alaska airlines to board due to time and difficulty pre-check the night before and kiosk did not work when I arrived at the airport and then finally told Alaska airlines is where I had to go. Not Hawaiian airlines that they had moved. That's when I was treated with the utmost disrespect by Alaska airlines agent that I was not allowed to board. And that might ticket to return was canceled and I hadn't even left yet when they gave me the option for the next flight to raise my flight price to $300 one way. I bought a $96 round trip ticket and they're trying to gouge me for $600 in addition and canceling my return flight.

Despite two calls as well as a chat on the website, Alaska would not add my TSA number to my reservation. The flight was switched from Hawaiian to Alaska which caused them to mess this up in the first place

The departure gate was changed from C1 to B18 but it was never announced at the C1 gate nor did I receive any email or text message or phone call about the gate change. I was in a window seat. In the other two seats next to me were Mr. Rotund and Ms. Rotunda, a youngish couple. Just the two of them should have booked three seats. I was smashed up against the wall and window for five hours. Overall, I'd say my flight sucked. Wouldn't you?

I couldn't get checked in 24 hours before either leg of my flight. I tried both my Alaska and Hawaiian codes on both apps.

We moved from the international terminal to a new location. I think there are still some bugs to work out . We didn’t receive check in notification and had to scramble to find it but i think it will work out

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.

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

Liked fold flat bed. Didn’t like having no window. Didn’t like poor choice of food and being served dinner very late, hours after take off of a 7:40pm flight. Servers not friendly. Food horrible in business class.

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

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

Information on your arrival and departure airports

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