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Find cheap flights from St. Louis to Idaho from $62

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Idaho departing on 5/15. 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
0 bags
Thu 5/30
Thu 6/6

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Best Idaho Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Boise
Boise1 stop$102
Idaho Falls
Idaho Falls1 stop$463
Lewiston
Lewiston2 stops$310
Pocatello
Pocatello1 stop$603

Good to know

Low season

April

High season

June

Cheapest flight

$62
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 4% increase in price.
Flight from St. Louis to Boise

FAQs - booking Idaho flights

  • How does KAYAK find such low prices on flights from St. Louis 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 St. Louis to Idaho.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Idaho from St. Louis 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 St. Louis 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 to Idaho with an airline and back to St. Louis with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis 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 to Idaho from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Idaho

  • Morning departure is around 6% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from St. Louis to Idaho

 
Need help choosing which airline to fly with from St. Louis 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
DeltaOverall score based on 10895 reviews
8.6Crew
8.2Boarding
7.4Food
7.9Comfort
8.0Entertainment
Airline reviews

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

8.0 ExcellentCynthia, Apr 2024TYS - ATL
Read more about Delta reviews

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

The pilots were good. Disappointing when planes don't have electrical ports

I liked the piloting of the aircraft. Very disappointed about lack of electrical ports. Also, although a short flight. there was enough time to hand out snacks to comfort + seats as was done for first class.

I had a wonderful experience flying with delta. The gentleman taking care of us on our flight was so nice, accommodating, and attentive. He always was smiling and giving pins to the kids which made me smile. The flight was quick too and without turbulence. Thank you for the great flying experience.

Delta is one of the best airlines I have flown

Made the Atlanta to Pittsburgh trip many times, with Delta no issues

I always fly with Delta. My friends tell me their horror stories of flying with other airlines. I just smile and say, “You should fly Delta”

I'm a larger, athletic guy (6'2", 260lbs powerlifter) and I found the seats incredibly uncomfortable with minimal leg room, especially in a window seat. Now, I full understand that being smaller may change my view but even if I was 80lbs less, my legs would be the same size and I was sandwiched between my seat and the seat in front of me.

Horrible. This was not first class. This was a connecting flight whi h was late. My original flight never came. I hated the fact that delta gave me a connecting flight from New York to Orlando Florida. No meals and the television screens were not working. There wasn't even any power to charge your phones. This is NOT FIRST CLASS DELTA!!! Do better next time!

This flight was ridiculous. I had to have a connecting flight from New York to orlando Florida??? The flight left late and because it was a short flight there was no first class amenities. I had one alcohol drink. The flight crew was fine, but it sure did not feel like first class. Delta to me dropped the ball by giving me a connecting flight. By the time we got to Raleigh we would have missed the next flight. Lucky for me the flight never came so now I was stuck waiting for a later flight that came in late also.

The overall flight went well and the aircrew was pleasant.

Very comfortable Prem economy seats for a long haul flight. Had a problem with the tv that the crew fixed so was great!

Cathay Pacific seems to be an airline in trouble and on its way out. Lots of broken or poorly functioning things like entertainment screens, seats, and enough well trained staff to handle a full flight. Sad...

The flight crew was exceptionally good. Personal needs were well met. The food choices were very nice.

Excellent. Planes are a little older and could get some refurbishment, but besides that everything was excellent.

While I was in great pain, the seat was sufficiently comfortable to allow me to rest and not be in so much pain.

we were upgraded which was a blessing and tender mercy for us. I fell the day before and was in extreme pain from knee to shoulder. Sitting in a more comfortable seat during the flight was an unexpected blessing and experience.

Seats were very comfortable. Crew were excellent. Food very good.

Flight crew was especially thoughtful and attentive, made sure our seats were comfortable so we could rest on the long flight

I felt thirsty and asked the flight attendent for water, but no one came for more than half an hour.

Great! The plane was decently sized and comfortable. The staff was nice and there was great in flight entertainment

Water service would be great. The way they board is terrible. Slow passengers first😂😂 They need to smart up a bit

Our original business class flight was cancelled so we not only downgraded but we were also spread out across the plane not sitting together in separate middle seats. My poor kids were scared and couldn’t see me on the flight and the crew wasn’t sensitive to the situation and what the airlines did to us. Very dissatisfied with United airlines.

Crew were fine, drinks and snacks were as well but we were delayed for around 2 hrs which made our entry into Mexico delayed as well with the influx of arrivals at the same time. Sort of wasted our first day of vacation. We left Pittsburgh at 630am and did not arrive in Mexico until late dinner time.

There was a group of school age passengers that were very loud and unruly with their chaperones were no where to be found.

Boarding was unorganized. They expected passengers to ask people to move their assigned seat they paid for in order to sit together. The seats even in comfort are smaller than other airlines and the flight attendants appeared not to be well prepared

The WiFi didn’t work and the seats are too close together. Very uncomfortable.

I was told we'd have a hot breakfast option in first class, so I chose not get a hot breakfast. It was a very strange meal, but the fresh fruit was very good quality. Service was excellent from ORD to ELP. No service from MBS to ORD, not even water. However, when flying American from FNT to ORD, which is a shorter flight, they at least pass out snacks and offer water.

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

So so. Terrible aircraft choice for that leg of the flight.

LATE LATE LATE!!! Plagued by late AA flights on this trip. Such a drag. This one was by far the worst.

WiFi connected but only let you go to the AA website, not even text messaging worked.

Too bad that first class seats do not recline significantly causing discomfort

Flight delayed over an over all day until it cancelled at 1:30am. Would not repeatedly delay that late. Offer hotel rooms and rebook early. Very difficult for families with small children

this is starting to seem like an american airlines standard. delayed flights and fake apologies… getting tired of it

This flight is frequently delayed. The connections seemingly are more frequently delayed. I’ve missed connections as a result twice on the same route to charlotte then Charleston. Final destination arrival has been the next day, twice in a row. No pilots, no crew. Too many excuses. Unfortunately, my days with American are over.

Entertainment was okay not because anything was wrong but it is a short flight so having no wifi is annoying but understandable. Crew was outstanding as usual

Those seats were way too narrow. I had the middle seat, one person was a very skinny person and we still couldn’t avoid touching each other anytime one of us moved. The other person was larger and we were basically sitting in each others lap the entire flight. There was zero entertainment. The flight was long enough to justify tvs, but no. Gotta sit there in your infant seat and twiddle your thumbs.

The Flight attendant had an attitude and didn't allow anyone any time to prepare for landing despite being absent throughout the entire trip

Flight boarded without pilots. Sat on plane for 3 hrs. after over an hour late boarding. Plane never took off. Had to deplane near midnight. Line for rebooking was 3 hours + long. I had to leave.

The guy with severe body odor sat next to me. For the whole duration of the flight it was a torture. The airline should have better policy on limiting people with bad body odor to board the flight. Passengers should not be the ones to endure bad odor for the whole duration of the flight. The airline should be e the one to ensure decent air quality for ever passenger.

Overall it was a miserable experience... I will never fly spirit for more than a 3 hour flight or overnight.

The boarding attendant was slightly rude when I asked about checking our stroller. Made me feel like I was bothering her.

My wife and I are both handicapped and at boarding they upgraded us to a seat closer to the front rather than all the way towards the back. Much appreciated.

Not much seat room, but that was unexpected. But the seat headrest was very uncomfortable.

First the good, everyone was friendly and efficient. Flight was smooth and plane was very clean and new. Now the bad, seats have almost no padding on your behind. I was in exit row so I had tons of leg room for a 6' 2" bean pole with long legs. Everything was extra - water, soda, snacks everything besides oxygen. Ya get what you pay for, and my flight was cheap as you could ever want it, so no worries.

First the good, everyone was friendly and efficient. Flight was smooth and plane was very clean and new. Now the bad, seats have almost no padding on your behind. I was in exit row so I had tons of leg room for a 6' 2" bean pole with long legs. Everything was extra - water, soda, snacks everything besides oxygen. Ya get what you pay for, and my flight was cheap as you could ever want it, so no worries. They dont really bother you about carry-on size, I brought a descent sized backpack and they didnt even check.

Spirit canceled the flight in March and never notified me!

Seats suck, not enough room, overcrowded planes, hectic situation all together.

Pretty good. Would’ve been excellent if we would have left on time and the crew wasn’t late.

Book cheap flights from St. Louis to Idaho

Recent round-trip flight deals

5/15Wed
1 stopSpirit Airlines
9h 20mSTL-BOI
5/28Tue
1 stopSpirit Airlines
12h 31mBOI-STL
$102
5/15Wed
1 stopSpirit Airlines
9h 20mSTL-BOI
5/28Tue
1 stopSpirit Airlines
12h 31mBOI-STL
$103
5/22Wed
1 stop
9h 20mSTL-BOI
5/27Mon
3 stops
17h 50mBOI-STL
$281
5/29Wed
1 stopAmerican Airlines
6h 55mSTL-GEG
6/5Wed
1 stopAmerican Airlines
8h 00mGEG-STL
$294
5/26Sun
1 stopDelta
5h 27mSTL-BOI
5/31Fri
1 stopDelta
5h 47mBOI-STL
$294
5/25Sat
1 stopAmerican Airlines
6h 42mSTL-BOI
5/31Fri
1 stopAmerican Airlines
5h 41mBOI-STL
$295
8/17Sat
1 stopDelta
5h 33mSTL-BOI
8/28Wed
1 stopDelta
7h 21mBOI-STL
$296
7/7Sun
2 stops
25h 14mSTL-BOI
7/13Sat
1 stop
22h 41mBOI-STL
$363
8/23Fri
1 stopUnited Airlines
7h 28mSTL-LWS
8/27Tue
1 stopUnited Airlines
5h 08mLWS-STL
$366
8/20Tue
1 stopUnited Airlines
9h 44mSTL-BOI
8/27Tue
1 stopUnited Airlines
6h 43mBOI-STL
$374

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Recent one-way flight deals

5/15Wed
1 stopSpirit Airlines
9h 20mSTL-BOI
$62
6/10Mon
1 stopSpirit Airlines
26h 58mSTL-BOI
$73
6/9Sun
2 stops
25h 24mSTL-BOI
$152
7/13Sat
1 stopAmerican Airlines
8h 02mSTL-GEG
$177
8/1Thu
1 stopAmerican Airlines
6h 52mSTL-GEG
$178
6/9Sun
3 stops
27h 18mSTL-BOI
$188
6/10Mon
2 stopsDelta
10h 21mSTL-BOI
$206
5/27Mon
1 stopDelta
5h 33mSTL-IDA
$239
7/13Sat
2 stopsUnited Airlines
31h 15mSTL-GEG
$328
6/14Fri
1 stopUnited Airlines
17h 55mSTL-IDA
$333

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Last minute flights from St. Louis to Idaho

Last minute flight, train and bus deals

5/1Wed
multi-stopAlaska Airlines
7h 38mSTL-GEG
5/11Sat
multi-stopAlaska Airlines
21h 03mGEG-STL
$699
5/1Wed
multi-stopDelta
20h 15mSTL-GEG
5/4Sat
multi-stopDelta
19h 34mGEG-STL
$732
5/1Wed
multi-stopDelta
8h 08mSTL-GEG
5/11Sat
multi-stopDelta
13h 24mGEG-STL
$777
5/1Wed
multi-stopAlaska Airlines
14h 52mSTL-GEG
5/11Sat
multi-stopAlaska Airlines
11h 24mGEG-STL
$789
5/2Thu
multi-stopAmerican Airlines
7h 20mSTL-IDA
5/4Sat
multi-stopAmerican Airlines
6h 43mIDA-STL
$799
5/1Wed
multi-stopAmerican Airlines
7h 12mSTL-GEG
5/11Sat
multi-stopAmerican Airlines
8h 24mGEG-STL
$800
5/1Wed
multi-stopDelta
6h 46mSTL-GEG
5/4Sat
multi-stopDelta
11h 47mGEG-STL
$807
5/2Thu
multi-stopDelta
11h 16mSTL-IDA
5/4Sat
multi-stopDelta
6h 31mIDA-STL
$819
5/1Wed
multi-stopAlaska Airlines
18h 01mSTL-GEG
5/2Thu
multi-stopAlaska Airlines
7h 09mGEG-STL
$822
5/1Wed
multi-stopUnited Airlines
14h 54mSTL-GEG
5/2Thu
multi-stopUnited Airlines
24h 04mGEG-STL
$999

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St. Louis - Idaho Flights

Departure:

St. Louis (STL)United States

Return flight deals:

Idaho - St. Louis

Cabin classes: