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SEA - SJU

$141 Find cheap flights from Seattle to San Juan

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to San Juan departing on 8/19. 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
Sat 6/29
Sat 7/6

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to San Juan.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to San Juan.
In the last 7 days travelers have searched 42,686,544 times on KAYAK, and here is why:

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Cheap flight deals from Seattle to San Juan (SEA-SJU)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle 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 and deals for you by selecting your travel dates.
Choose your dates
5:00 pm - 5:15 pmSEA-SJU
21h 15m2 stops
1:09 am - 8:21 pmSJU-SEA
22h 12m2 stops
$224Spirit Airlines
Find Deal
Mon, Aug 26 - Tue, Aug 27
5:00 pm - 5:15 pmSEA-SJU
21h 15m2 stops
6:00 am - 8:21 pmSJU-SEA
17h 21m2 stops
$239Spirit Airlines
Find Deal
Mon, Aug 26 - Wed, Aug 28
4:07 pm - 3:01 pmSEA-SJU
19h 54m2 stops
4:07 pm - 10:26 amSJU-SEA
21h 19m2 stops
$316Frontier
Find Deal
Mon, Jun 10 - Fri, Jun 21
8:12 pm - 2:51 pmSEA-SJU
15h 39m2 stops
4:07 pm - 7:06 amSJU-SEA
17h 59m2 stops
$318Frontier
Find Deal
Tue, Jun 11 - Tue, Jun 18
10:32 pm - 10:52 amSEA-SJU
9h 20m1 stop
11:59 am - 8:43 pmSJU-SEA
11h 44m1 stop
$330American Airlines
Find Deal
Mon, Oct 14 - Thu, Oct 24
11:40 pm - 1:08 pmSEA-SJU
9h 28m1 stop
2:42 pm - 8:50 pmSJU-SEA
10h 08m1 stop
$332American Airlines
Find Deal
Mon, Nov 4 - Wed, Nov 13
7:00 pm - 12:05 pmSEA-SJU
14h 05m2 stops
1:05 am - 10:48 amSJU-SEA
12h 43m1 stop
$372United Airlines
Find Deal
Tue, Oct 15 - Tue, Oct 22
5:00 am - 8:38 pmSEA-SJU
12h 38m1 stop
1:05 am - 10:47 amSJU-SEA
12h 42m1 stop
$411United Airlines
Find Deal
Tue, Aug 13 - Sun, Aug 25
7:20 am - 10:03 pmSEA-SJU
11h 43m1 stop
8:15 am - 4:51 pmSJU-SEA
11h 36m1 stop
$454Delta
Find Deal
Thu, Sep 12 - Sat, Sep 28
9:15 pm - 1:19 pmSEA-SJU
13h 04m1 stop
7:30 am - 7:22 pmSJU-SEA
14h 52m1 stop
$474Delta
Find Deal
Sat, Jul 20 - Fri, Jul 26

Flights from Seattle to San Juan - Travel Insights & Trends

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

What’s the cheapest day of the week to fly from Seattle to San Juan?

The average price of all flights from Seattle to San Juan Luis Munoz Marin Intl Airport clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to San Juan on a Monday and more expensive on a Thursday. On your return trip to Seattle, you should consider flying back on a Wednesday, and avoid Sundays for better deals.

What is the cheapest month to fly from Seattle 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 flights from Seattle 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 Seattle to San Juan Luis Munoz Marin Intl Airport is January, where tickets cost $371 on average. On the other hand, the most expensive months are July and June, where the average cost of tickets is $837 and $686 respectively.

How far in advance should I book a flight from Seattle to San Juan Luis Munoz Marin Intl Airport?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Seattle to San Juan Luis Munoz Marin Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Seattle to San Juan Luis Munoz Marin Intl Airport, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 66 days before departure.

Which airlines provide the cheapest flights from Seattle to San Juan?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest one-way tickets to San Juan from Seattle were found on American Airlines ($141) and Frontier ($145), and the lowest round-trip tickets were found on Spirit Airlines ($224) and Frontier ($316).

Good to know

Low season

October

High season

December

Cheapest flight

$141
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from Seattle to San Juan

When to book flights from Seattle to San Juan

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

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

    In the last 3 days, the lowest price for a flight from Seattle to San Juan Luis Munoz Marin Intl Airport was $141 for a one-way ticket and $224 for a round-trip.

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

    Yes

  • Which airports will I be using when flying from Seattle to San Juan?

    On your way to San Juan, you’ll fly out from Seattle/Tacoma Intl. You’ll be landing at San Juan Luis Munoz Marin Intl.

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

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

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

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

  • What is the most popular layover when flying to San Juan from Seattle?

    Charlotte is the most popular layover city among KAYAK users traveling from Seattle to San Juan.

  • Which is the best airline for flights from Seattle to San Juan, Delta or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from Seattle to San Juan are Delta and Alaska Airlines. With an average price for the route of $690 and an overall rating of 8.0, Delta is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $599 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Seattle 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 Seattle to San Juan.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan from Seattle 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 Seattle 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 Seattle with another airline. Booking your flights between Seattle 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 Seattle 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 Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 airlines serving from Seattle to San Juan

 
See real verified KAYAK customer reviews for airlines flying from Seattle 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 Seattle 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.
8.0
Alaska AirlinesOverall score based on 9192 reviews
7.3Food
7.3Entertainment
8.2Boarding
8.6Crew
7.9Comfort
Airline reviews

Cabin crew very friendly and pleasant. Flight left late but we didn't know why. Alaska Airlines app was not user friendly -- app wouldn't let us upgrade our seats, but no indication if flight was full. We wound up having to call the airline to request an upgrade and we were told none was available. Waste of time. Baggage retrieval was easy.

8.0 ExcellentElaine, May 2024SEA - PHL
Read more about Alaska Airlines reviews

Cabin crew very friendly and pleasant. Flight left late but we didn't know why. Alaska Airlines app was not user friendly -- app wouldn't let us upgrade our seats, but no indication if flight was full. We wound up having to call the airline to request an upgrade and we were told none was available. Waste of time. Baggage retrieval was easy.

The boarding gate is literally just an aisle to the concourse. There is no seating and it's shared with several other airlines. It's crowded, hot, and standing-room only. It's difficult to hear gate announcements over the PA system with too many other carriers crammed into a small space. I've enjoyed flying AA in the past on the west coast, but the BNA single gate experience is horrendous! Never again from BNA to SEA with AA.

It was a partial full flight. But even with a spare seat it was hard to get comfortable More on me being a wide body probably

Our flights using Alaska Airlines went great! All of the flight attendants were very friendly. Big shout out to the pilots for getting us to and from our destinations safely!

I can’t complain. Perhaps passing out headphones, but it was on me to bring my own since I could have used some for my personal device.

I liked only the crew. The flyght was too much fast, faster than it should be, on 20 min faster, but not safer, I experienced on myself astranautic overload from suddenly appearing in the sky and all the vibrations of the turbines, because I had my place at the level of the wings. Pregnant woman should not be seated on the level of the wings with all turbines, pregnant woman should be offered to charge place to seat closer to front or in the back, but not at the level of all the turbines. Vibrations of turbines are not healthy for pregnancy. I hold all the flight my belly in my hands to avoid miscarriage. If it would be longer flying distances, I could have miscarriage with Alaskan airlines.

I didn't have food or use entertainment, so those evaluations are invalid.

I do not feel the priority seating I paid for was was adequate for the cost. there was no difference from coach on any other airline, and it was very uncomfortable

First flights on Alaska Air, and I will go out of my way to fly them whenever I can in the future. An incredible experience, above and beyond any other airline.

It was warm on the plane. Perhaps the people who were coughing quite often should be encouraged to wear a mask?! It was a long 4 hours.

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

Had a broken tray in business class. Crew just shrugged it off.

Everything was great except for the seat. The backrest would not stay in the upright position.

public website still broken for years randomly blocking browsers with privacy options active after loading a page maybe once. check-in on laptop was almost impossible but eventually randomly worked. had to print pass at airport since couldn't get back in to load digital pass on mobile firefox or chrome. red eye flight so smooth onboarding, plenty of room to spread out, easy offboarding. onboard wifi instructions mention vpn can cause problems connecting but fails to also mention private dns. no printed or built in menu list, seems weird to require personal device to point at qr code link for menu which does not even allow direct ordering. people with health condition risk related dietary restrictions trying to avoid for example cholesterol and sugar are left guessing what they can order either way without nutritional info highlights (cranberry juice was minute maid cocktail with as much suger as typical can of soda). tap to pay wasn't working and always seems sketchy to manually enter card info. good movie variety, so limited tv was okay.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Mi primera conexión se retrasó por lo cual perdí mi segunda conexión la cual salió adelantada

Crew was not friendly when I went to request a seat change.

There were choices for the snacks. Good choices and tasty lunch and breakfast as well.

The flight crew was amazing. I’m very tall and they moved me to an exit row unsolicited!!! Amazing service.

Overall fine but both ways for this trip was delayed.

Flight was delayed by almost 5 hours. Suitcase was not loaded despite the flight being near empty (my colleagues’ suitcases did reach JFK, unlike mine). Had to argue on phone to get JetBlue to deliver the case to my hotel. Never again

The flight was excellent. The crew was welcoming and attentive.

Great! I love Jet Blue. My favorite airline! Very efficient, clean and timely.

Run out of snack choices. Why are the seats not padded for your butt? Are we sitting on blocks of wood or metal for $250-300 a pop? This ain’t spirit. Let’s get it together people

We were told that our flight would be delayed for 90+ minutes because of weather, so we went to get something to eat only to have them randomly start boarding 15 minutes after the announcement, with no warning.

Entertainment... No earphones passed out. Many including me couldn't use the TV. Legroom was good. Crew was indifferent and a bit surly. Free wifi was a nice convenience. Check in desk location was unknown. Gate number on the boarding passes was wrong.

Going through JFK’s security is a mess. The TSA security said no shoes on the bins. So, we place our shoes in the belt and they came out all over the belt. Boarding was delayed and Flight as well.

Safe and on time were the positives. The plane wasn't cleaned before boarding, there was garbage and food on the floor and in the seat pocket. The TV screen was small and the picture fuzzy, audio quality was poor. Seatbelt was fraying and seat did not recline properly. No charging ports near the seats,

Confusing. Delay updates were out of whack At one point it said my flight was 25 hours. Three gate changes and two delays only to change back to original departure time. Gate announcer and on board flight attendant (Alejandro) making the announcements was impossible to understand due to accent and speed of speech. After beverage service the rear flight attendants sat back there on their phones. No refills no checking in, one sweep through for trash collection. Very impersonal. Bring back Coke products

Well....let's start from the point that I had to stay in airport for 12 hours instead of 2 that was scheduled. Poor company and even worst customer service. Never again....

The flight and boarding were easy peasy. I was traveling with my 4-year-old, so a smooth boarding experience was especially appreciated. My only piece of feedback is really about where our gate was in O'Hare. They've shoved four gates into a tiny corner of the B terminal and there isn't early enough room or seating for everyone. Not United's problem, but did dent the overall experience.

We liked the fully reclinable seats. Had center seats, so it was difficult to talk to spouse. Crew was great

Aisle chair was good and liked the foot bar preventing you from putting your foot in the isle, The breakfast on this international flight to Zurich was horrible (Europeans, specially, used to good food) may make this a dealbreaker for booking with United Airlines again. I agreed with my Spanish fellow passenger.

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

There was no screens on board AND the WiFi didn’t work. My seat was broken and couldn’t recline so I couldn’t even sleep. The flight attendants didn’t offer anything to make it more comfortable. It was such an old cramped plane, when the person in front of me reclined I couldn’t even open my tray table. All the United ads talk about guaranteeing everyone gets a screen!

The Wi-Fi was unavailable on this flight for some reason.

The flight was delayed almost 2 hours. Bad customer service etc. I will never fly Luthansa. Ever!!!

On time take off…US cabins look tired and need of refresh!

Fine. Though no food or entertainment so the survey needs to be updated with those options.

28 hour delay at Fort Worth/Dallas airport, part due to weather which was unavoidable, but various other reasons - no pilot, no fa, mechanical problem, plane too small, too big, crew out of flying time, seat configuration problems.... endless and hourly updates with a different excuse. Finally told us about 3.00 am, that the flight was delayed to hours later.

Experience was bad. 3.5 hour delay for a 2.5 hour trip. There was no r Transparency about the reason for the delay and it was done 30 mins at a time.

Original flight delayed several times and finally canceled at 2:30 in the morning. Staff at the gate was not very helpful in resolving problems or communicating why there were delays. I spent 34 hours at the airport before I could leave, they couldn't book me on another early flight even after canceling my original flight. Next flight available after my original flight was canceled was 22 hours later. I will never fly American Airlines again.

very very tight seats unfriendly crew who do not seem to care about the comfort of their passengers and do not know how to smile poor ground staff support at LHR and PHX

The boarding process and flight were great. However, I waited about 40 minutes for my luggage. It did not come up on the designated belt. Instead, everyone’s bags were on a cart. Not sure what the issue was, but we were not informed until another passenger went looking for her bags and found them.

There were delays on both ends. It made it less than excellent. This plane was great though

AA1537 the AC was not working properly. It was very hot and uncomfortable.

So uncomfortable to sit in the tiny space on a long, international. Food was rough. Please, less white flour and processed food.

Worst experience flying American Airlines. I fly with them often, so I was super disappointed in the service I received at gate 30 in LGA on May 24, mid-day. The flight was delayed twice. I was patiently waiting in the American Airlines lounge when I received the notice on my app that the plane was boarding 45 minutes before its newly re-scheduled take off of 4 pm (from the orginal 1:45 pm then 3:00 pm). It took me 5 min to travel from the lounge to the gate and when I arrived there at 3:20 flight gate attendant told me the flight had closed and that they announced for passengers multiple times. I showed them the notification on my app and they were really rude and unempathetic. The person who rescheduled my flight at customer service wasn't any happier but was at least helpful in getting me on the next flight.

Flight was 1/2 hour delayed leaving Phoenix. Otherwise it was an average flight. Flight crew on this trip was very nice.

Book cheap flights from Seattle to San Juan

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Seattle to San Juan found on KAYAK in the last 72 hours.
8/19Mon
1 stopAmerican Airlines
11h 28mSEA-SJU
$141
7/11Thu
2 stopsFrontier
15h 36mSEA-SJU
$145
8/20Tue
3 stopsSpirit Airlines
30h 33mSEA-SJU
$153
11/5Tue
2 stopsUnited Airlines
11h 51mSEA-SJU
$186
7/18Thu
1 stopDelta
12h 44mSEA-SJU
$227
9/2Mon
1 stopAlaska Airlines
13h 04mSEA-SJU
$242
8/4Sun
1 stopUnited Airlines
12h 38mSEA-SJU
$252
8/3Sat
1 stopDelta
13h 59mSEA-SJU
$282
6/7Fri
1 stopJetBlue
10h 16mSEA-SJU
$294
7/8Mon
1 stopJetBlue
11h 47mSEA-SJU
$364

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Last minute flights from Seattle to San Juan

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Seattle to San Juan that are departing in the next 10 days.
6/4Tue
multi-stop
15h 37mSEA-SJU
6/14Fri
multi-stop
22h 27mSJU-SEA
$360
6/4Tue
multi-stop
15h 37mSEA-SJU
6/11Tue
multi-stop
22h 51mSJU-SEA
$406
6/3Mon
multi-stopSpirit Airlines
19h 07mSEA-SJU
6/17Mon
multi-stopSpirit Airlines
23h 29mSJU-SEA
$452
6/4Tue
multi-stopSpirit Airlines
34h 50mSEA-SJU
6/11Tue
multi-stopSpirit Airlines
22h 51mSJU-SEA
$453
6/4Tue
multi-stopAmerican Airlines
11h 49mSEA-SJU
6/11Tue
multi-stopAmerican Airlines
19h 29mSJU-SEA
$532
6/4Tue
multi-stopAmerican Airlines
11h 49mSEA-SJU
6/9Sun
multi-stopAmerican Airlines
19h 29mSJU-SEA
$588
6/2Sun
multi-stopUnited Airlines
12h 01mSEA-SJU
6/3Mon
multi-stopUnited Airlines
16h 21mSJU-SEA
$758
6/4Tue
multi-stopUnited Airlines
12h 00mSEA-SJU
6/13Thu
multi-stopUnited Airlines
13h 02mSJU-SEA
$882
5/31Fri
multi-stopDelta
12h 45mSEA-SJU
7/15Mon
multi-stopDelta
15h 14mSJU-SEA
$958
6/4Tue
multi-stopDelta
11h 04mSEA-SJU
6/21Fri
multi-stopDelta
10h 54mSJU-SEA
$5,114

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Seattle - San Juan Flights

Departure:

Seattle (SEA)United States

Destination:

San Juan (SJU)Puerto Rico

Return flight deals:

San Juan - Seattle

Cabin classes: