BOI - SJU

$271 Find Cheap Flights from Boise to San Juan - 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 Boise to San Juan departing on 7/28. 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, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Juan Luis Munoz Marin Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boise to San Juan, 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 Boise to San Juan, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$436
Typical prices: $508-$638
Southwest
Mon 8/17Tue 8/25
BOI - SJU • 2 stops
Cheapest one-way
$271
Delta
Tue 7/28
BOI - SJU • 1 stop
Top airlines
Cheapest • from $436 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Boise and San Juan. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $695 (round-trip)
Shortest trip • 9h 13m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 22% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Juan!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Boise to San Juan (BOI-SJU)

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

Mon, Aug 17 - Tue, Aug 25
Southwest Logo
11:30 am - 11:50 pm
BOI
-
SJU
10h 20m
2 stops
Southwest Logo
5:15 am - 2:50 pm
SJU
-
BOI
11h 35m
2 stops
$436Southwest
Mon, Oct 12 - Mon, Oct 19
United Airlines Logo
6:50 pm - 11:57 am
BOI
-
SJU
15h 07m
2 stops
United Airlines Logo
2:00 pm - 9:35 pm
SJU
-
BOI
9h 35m
1 stop
$496United Airlines
Wed, Oct 7 - Fri, Oct 16
United Airlines Logo
5:00 am - 5:38 pm
BOI
-
SJU
10h 38m
1 stop
United Airlines Logo
2:00 pm - 9:35 pm
SJU
-
BOI
9h 35m
1 stop
$526United Airlines
Fri, Oct 16 - Fri, Oct 23
Delta Logo
4:05 pm - 11:56 am
BOI
-
SJU
17h 51m
2 stops
Delta Logo
12:46 pm - 10:41 pm
SJU
-
BOI
11h 55m
1 stop
$536Delta
Fri, Oct 16 - Fri, Oct 23
Delta Logo
7:13 pm - 11:36 am
BOI
-
SJU
14h 23m
2 stops
Delta Logo
2:31 pm - 10:22 pm
SJU
-
BOI
9h 51m
1 stop
$539Delta
Mon, Aug 17 - Mon, Aug 24
American Airlines Logo
5:19 pm - 12:40 pm
BOI
-
SJU
17h 21m
2 stops
American Airlines Logo
12:55 am - 1:24 pm
SJU
-
BOI
14h 29m
2 stops
$542American Airlines
Wed, Oct 7 - Fri, Oct 16
American Airlines Logo
2:55 pm - 11:05 am
BOI
-
SJU
18h 10m
2 stops
American Airlines Logo
7:00 pm - 11:26 am
SJU
-
BOI
18h 26m
2 stops
$547American Airlines
Mon, Oct 12 - Mon, Oct 19
Southwest Logo
11:45 am - 12:35 am
BOI
-
SJU
10h 50m
2 stops
Southwest Logo
5:00 am - 3:30 pm
SJU
-
BOI
12h 30m
2 stops
$551Southwest
Fri, Jul 31 - Fri, Aug 7
Southwest Logo
10:25 am - 12:10 am
BOI
-
SJU
11h 45m
2 stops
Southwest Logo
5:00 am - 4:15 pm
SJU
-
BOI
13h 15m
2 stops
$574Southwest
Wed, Oct 28 - Mon, Nov 2
United Airlines Logo
6:30 am - 5:25 pm
BOI
-
SJU
8h 55m
1 stop
United Airlines Logo
8:05 am - 9:30 pm
SJU
-
BOI
16h 25m
2 stops
$578United Airlines
Booking Insights

KAYAK's insights & trends for Boise to San Juan flights

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

What is the cheapest month to fly from Boise to San Juan Luis Munoz Marin Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boise to San Juan Luis Munoz Marin Intl Airport, 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 Boise to San Juan Luis Munoz Marin Intl Airport is September, where tickets cost $526 (return) on average. On the other hand, the most expensive months are July and February, where the average cost of round-trip tickets is $828 and $827 respectively.

Good to know

Low seasonAugust
Cheapest flight$271
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly and prices are also 11% lower on average.
Flight from Boise to San Juan

When to book flights from Boise to San Juan

Are your dates flexible? Find out the best times to travel from Boise to San Juan 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 Boise to San Juan flights

  • What is the cheapest flight from Boise to San Juan Luis Munoz Marin Intl Airport?

    In the last 5 days, the lowest price for a flight from Boise to San Juan Luis Munoz Marin Intl Airport was $271 for a one-way ticket and $436 for a round-trip.

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

    A passport is required to fly from Boise to San Juan.

  • Which aircraft models fly most regularly from Boise to San Juan?

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

  • Which airline alliances offer flights from Boise to San Juan?

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

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

    The two airlines most popular with KAYAK users for flights from Boise to San Juan are Southwest and Delta. With an average price for the route of $560 and an overall rating of 7.9, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $581 and an overall rating of 7.8.

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

    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 Boise to San Juan.

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

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

    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 San Juan with an airline and back to Boise with another airline. Booking your flights between Boise and SJU 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 Boise to San Juan?

    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 San Juan from Boise 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 Boise to San Juan

 
See real verified KAYAK customer reviews for airlines flying from Boise to San Juan. 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 Boise to San Juan? 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
SouthwestOverall score based on 4246 reviews
8.1Boarding
8.0Comfort
7.5Entertainment
7.0Food
8.6Crew
Airline reviews

SW can't get their wifi right. I upgrade to insure wifi service but the last two trips had intermittent service. Not worth the extra costs.

6.0 GoodAnonymous, Jun 2026
TPA - DAL
Read more Southwest reviews

SW can't get their wifi right. I upgrade to insure wifi service but the last two trips had intermittent service. Not worth the extra costs.

The flight was late. The crew was rude. There was no food. Cramped and uncomfortable. Nothing about this flight was good.

Crew was rude, flight was late, wifi didn't work, no food, basically nothing about this flight was good.

It was just okay, no frills, basic transportation with no luxury. No screens on the seats, no water or drinks on a short flight. Full flight but at least it was on time.

Flight was constantly delayed with significant changes in time, it was supposed to get to Colorado Springs at 8:30 PM but it got there after midnight.

Over a 3 hour flight. The turbulence was almost imperceptible except for 2 short periods which were not bad and over quickly. The attendants claimed "Safety first" and sat looking at their phones for 3 hours with no drink or snack service. This isn't the first time with Southwest. I thinkit may be there new plan of operation. Oh, and it was June 18, Southwest's Birthday which offered free drinks. NOT.

Flight was delayed, full flight and I had to change gates. Southwest flights are always late later in the day.

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

The WiFi and crew on the plane were good, however, the boarding experience was awful. I paid for the Choice Preferred and was boarded in group 5 so all overhead storage was full. They found room for our luggage, but further back making getting off the plane a nightmare. Also, we were in row 6 and the seats were extremely uncomfortable. Both my daughter and I had no leg room and couldn’t wait to get off the plane.

it was great. the crew is exceptional. the flight was on time.

Crew was real good, flight was smooth and came in early.

It was good. The leg room was not great in Row 1.

This flight was a first class choice and left much to be desired. Seat backs on seats were falling apart and torn. Seats actually didn't come to a "full & upright position". Pull out table was sprung. Not any significant leg room. All in all we were on an obviously older plane and felt overcharged for what we received as first class.

My husband is very tall and we generally fly Delta Comfort. We used our companion benefit, and our seats were coach and extremely uncomfortable........ horrid even

I specifically picked out right side aisle seats because my left knee sometimes needs to be stretched. But my experience this trip was that the seats were shuffled and I lost those assigned seats, resulting in me having to sit in a much less desirable position for my comfort.

Other airlines were canceling flights but Delta got us home. Crew was friendly and professional. It would have been nice to have had a little more notice about the delays because we had already arrived at the airport when the first of several delays were communicated but I understand that storm forecasting isn’t simple and we were grateful that Delta didn’t just cancel the flight.

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

When we checked in my friend and I were sitting seperate. By the time we got to boarding, they automatically switched our seats. I really liked that.

On time departure and early arrival. Kind and professional service from flight crew

I trust Delta. I travel comfortable. The snacks could improve or could go to something as a little sandwich.

Staff could’ve been a little more cordial. The men were much more friendlier than the women. My daughter and I also missed the 2nd to last meal as we were sleeping but that is on us.

Great staff. Clean plane, but we were delayed for more than an hour due to maintenance issues and had to board another plane.

I was very disappointed with my experience at the United Airlines baggage check. The representative was rude and unhelpful. I was required to remove approximately 1.5 pounds from my two checked bags, even though it was a very small amount over the limit. The interaction was unnecessarily unpleasant, and I expected much better customer service. I hope United will review this incident and provide additional customer service training to its staff.

No extra snacks were available. Meals quality is terrible. Crew was not friendly.

Read the fine print. This was my flight home. I booked my flight for the quickest way home. Had a carry-on and a personal item. Same as my outbound flight. Apparently I needed to pre-pay extra for my carry-on. When I checked in, I was told that I had to check it. I said I’ll pay for it, and was told that this wasn’t an option anymore. They said I still had to pay $50 to check my carry-on. I told them I’ll pay whatever to just carry it in as intended. I was not allowed, so eventually I paid $50 to check my carry-on under a plane that was half full, with overhead compartments that were even less full. My white carry-on suitcase was practically destroyed getting from Idaho falls to Denver to Orange County. The low price air fair was a bait and switch. Got me to the gate, made me pay extra, then didn’t even allow me to pay for a carry on. Not to mention that I paid the $8 for WiFi that didn’t work. All to get my suitcase destroyed. I don’t think I’m going to even keep my Untied mileage plus membership and card. Apparently, membership does not have its privileges for this one.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

During landing. 2 crew members passed 3 times by my lane and didn't notice that people in front of us had their site to the furthermore reclined... That was uncomfortable and could have been dangerous.

My flight was completely full. Making me very stressful with people walking around all the time. I believe airlines can do better for entertain people during the flight.

United Airlines was fantastic, however, UnderPricer was a nightmare. I got to the airport 4 hours before my flight. We are moving to New Zealand so had quite a bit of baggage (16 checked items) and so wanted to have plenty of time to get everything taken care of properly. When I went to check in they (United) could only find a ticket for me. The 5 tickets for my children were never officially ticketed. I called Underpricer and they told me it was United's fault and United told me that Underpricer just needs to reissue the tickets, but they refused to. I asked the Underpricer agent to transfer me to his supervisor as I was not getting the help I needed. He told me the supervisor was busy but that he would call me back in 30 minutes. 30 minutes came and went with no phone call. After an hour I called Underpricer back but they would not let me talk to the person I had talked to before, just told me that he was talking with the supervisor and technical support. I called again an hour later, was told the same thing. I tried again later, with only about 30 minutes until my flight was scheduled to leave (meaning I had been at the airport for more than 3 hours with my 5 children trying to get ticketed and board the flight). Also, my husband had moved to New Zealand 3 months prior, I haven't seen him in 3 months, my children hadn't seen their dad in 3 months, we were all extremely eager to get on that flight and get to New Zealand. The situation with the tickets did not get resolved until after it was too late to check our luggage and board our flight. We were devastated. My 11 year old son was in tears at not being able to be on his way to see his dad. Thankfully we were rebooked for the next evening, but that night it felt devastating. We'd been at the airport for 4 hours waiting. My in-laws waited with me and then helped me reload all our baggage and took us home to stay with them for the night. On the newly booked flights we could not sit together - my children were spread throughout the plane. So, even though I had paid extra to select our seats after buying my seats from Underpricer only two of us were able to sit together (thankful that my 11 year old wasn't all by himself, but not happy that my 14 & 16 year old daughters were seated by strangers). I really feel that Underpricer should refund me what I paid for the seating ($120 USD). It was a very frustrating situation and I plan on never using Kayak or Underpricer ever again.

The United website was easy to use and had all the information I needed. I needed to change my flight and it was accomplished easily on line. I was also easily able to upgrade and for a reasonable price. Boarding went smoothly and the flight was in time. The service was good in board but the crew did not seem happy at all. Limited availability of meals - not much choice for purchase and in business class they ran out of one of the meal choices by row 4. .

Flight was delayed…once landed at ORD, no gates were available so made us wait for 56 minutes after we landed to let us out of the aircraft!

Entertainment system did not function. USB ports did not function. Wi-Fi did not function. Terrible trifecta…

I cancelled this flight 2 days before departure but I followed your texts and emails and IF you were correct this flight turned into a nightmare.

My flight was delayed twice. The first time because of “plane maintenance” and the second because the previous flight who supposedly “arrived early” took an obnoxiously long time to get off the plane. Total delay was over an hour for no reason. Not to mention your airline repeatedly changed our gate from one end of the terminal to the other. Not very happy about this experience. My previous flights with American haven’t had this many issues.

Delayed delayed. Poor professionalism. Our seats changed and we pay for them

The plane was broken so we had to change planes.

Uncomfortable seats and flight attendant was rude as she insisted on waking up my husband to ask him if he wanted a drink. When he said that he was sleeping, she replied “without an attitude “. He was seated at 8c

Flight was delayed due to a steering issue with plane. The delay caused me to miss the connecting flight. The delay caused me to spend an extra 21 hours in airports and flights to get to my destination. The plane issue obviously should have been found and fixed before we even boarded. Ridiculous.

Airlines must do something with overweight people... Maybe reserve a business class seat for them, or you could pay the consequences if someone overweight seat side by side to you in economy.

Iberia didn’t let me check in online or select my seats, the experience overall was not very pleasant

Everything you need to know for your flight from Boise to San Juan

Information on your arrival and departure airports