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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
mié. 6/12
mié. 6/19

Search hundreds of travel sites at once for deals on flights 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.
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 41,771,603 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
8:12 pm - 2:51 pmSEA-SJU
15h 39m2 stops
4:07 pm - 7:06 amSJU-SEA
17h 59m2 stops
$246Frontier
Find Deal
mar., jun. 11 - mar., jun. 18
8:14 pm - 2:51 pmSEA-SJU
15h 37m2 stops
4:07 pm - 10:26 amSJU-SEA
21h 19m2 stops
$256Frontier
Find Deal
mar., jun. 4 - vie., jun. 14
10:51 pm - 2:40 pmSEA-SJU
11h 49m1 stop
2:05 am - 11:23 amSJU-SEA
13h 18m1 stop
$276United Airlines
Find Deal
lun., nov. 4 - mar., nov. 5
10:32 pm - 10:52 amSEA-SJU
9h 20m1 stop
11:59 am - 10:50 pmSJU-SEA
13h 51m1 stop
$279American Airlines
Find Deal
mar., oct. 8 - mar., oct. 15
12:18 am - 3:20 pmSEA-SJU
12h 02m2 stops
12:03 pm - 11:20 pmSJU-SEA
14h 17m1 stop
$282American Airlines
Find Deal
mar., ago. 27 - mar., sep. 10
7:30 pm - 2:40 pmSEA-SJU
15h 10m3 stops
2:05 am - 11:23 amSJU-SEA
13h 18m1 stop
$366United Airlines
Find Deal
lun., nov. 4 - mar., nov. 5
8:40 pm - 9:56 amSEA-SJU
10h 16m1 stop
10:35 pm - 10:13 amSJU-SEA
14h 38m1 stop
$455JetBlue
Find Deal
dom., jun. 9 - dom., jun. 16
12:30 am - 4:13 pmSEA-SJU
12h 43m2 stops
12:54 pm - 11:56 pmSJU-SEA
14h 02m1 stop
$475Delta
Find Deal
lun., sep. 2 - vie., sep. 13
8:40 pm - 10:11 amSEA-SJU
10h 31m1 stop
10:35 pm - 10:13 amSJU-SEA
14h 38m1 stop
$476JetBlue
Find Deal
mar., jun. 4 - vie., jun. 14
12:30 am - 4:13 pmSEA-SJU
12h 43m2 stops
8:15 am - 6:40 pmSJU-SEA
13h 25m1 stop
$510Delta
Find Deal
mié., sep. 4 - dom., sep. 8

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 $378 on average. On the other hand, the most expensive months are July and June, where the average cost of tickets is $851 and $754 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 ($170), and the lowest round-trip tickets were found on Frontier ($246) and United Airlines ($276).

Good to know

Low season

October

High season

December

Cheapest flight

$141
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly with an average 17% 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 $246 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 SkyTeam 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 JetBlue?

    The two airlines most popular with KAYAK users for flights from Seattle to San Juan are Delta and JetBlue. With an average price for the route of $749 and an overall rating of 8.0, Delta is the most popular choice. JetBlue is also a great choice for the route, with an average price of $648 and an overall rating of 7.6.

  • 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 9144 reviews
7.3Entertainment
8.2Boarding
7.9Comfort
8.6Crew
7.3Food
Airline reviews

They canceled my flight going back to SF after I was at the airport. Wanted me to take a flight 14 hours later. Not a happy camper.

2.0 MediocreRandy, May 2024SEA - SFO
Read more about Alaska Airlines reviews

They canceled my flight going back to SF after I was at the airport. Wanted me to take a flight 14 hours later. Not a happy camper.

Service was excellent. Staff at check in cleared hurdles for me so I could travel with my service animal.

Flight cancelled an hour before takeoff due to "unscheduled maintenance". New flight makes me have to wait for 5 hours in the airport, at a gate totally on the other side of where I'm at, requiring me to take a tram to get from the N terminal, to the C terminal. After waiting for 5 hours I'm informed my new flight is no longer at the gate I'm at, but instead is back in the N terminal where I was previously.

Delayed an hour and sat without updates. Ended up an hour late to destination

The flight was decent again if there was a place that you could put crying children that would be great. Or maybe make a rule against allowing infants on the plane.

Everything was fine -- on time, clear, clean. I don't want to pay extra for in-flight wi-fi

The flight was delayed because the pilots had not arrived on their previous flight yet. The flight was 100% full so it was pretty crowded. I miss having the screens on the back of the seats. It would be great if the Alaska planes had the clip so you can put your phone or tablet on the back of the seat in front of you to not strain your neck. Everything else was very smooth.

It was fine since it ensure we went to our destination in time.

I bought the cheapest ticket. No meal, no checked luggage so I didn't expect much and was surprised by how good the flight and service was. Alaska is now my favorite airline.

No entertainment, food was cookies & juice,water, soda or coffee.

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.

Delayed departure. Delayed after landing pulling into gate. Delay due to sky bridge malfunction

Great. Loved that there was WiFi on flight to keep in touch and excellent service of beverages and snacks.

Business class is great. New airplane, very comfortable, better than some of the major airlines I am used to

Terrible. Flight was cancelled due to the weather in the east and sout east(florida). Did not get any compesation of any kind. According to them, it was not under their control so I lost all the money paid for the 2 fairs from Raleigh, NC to Orlando, Fl.

great flight. Pilot was communicative, flight attendants were excellent. Really nice experience except my tv didn’t work.

Overall, the flight was better than the flight I took to go to Florida, which had a bunch of problems. The crew is really nice and the plane was new so it had a small problem when we were on the runway, but the flight itself was great. They even made some time back up, which is always a good thing.

at the time for boarding the lady just call Group A and no other goups and everybody from A to F go inside without the right turn,and when we get in theres no more spsce for carry on , the ones that get in at not correct group from the back occupy our space !!!!! a mess !!!!

There were multiple delays but JetBlue tried to make the boarding and departure process as quick and efficient as possible. The crew was as detached from reality as could be, meaning: not very friendly and just doing things by the numbers.

I had back trouble prior to my flight and everyone was great about helping me.

Jetblue needs to improve on Onboarding as it seems to always be behind on departing. It never leaves on time. I would recommend to have an earlier Onboarding in order to leave on time and respect your customers time as well.

Not a fan of the diagonal partially enclosed business class seats or how they have to be converted to beds manually by crew. I prefer more isolation and user control for switching to lie flat.

No lounge access with “United First” ticket. False alarm about late flight, jeopardizing connection. Wrong meal. Loose power socket would not hold plug, could not charge device. In-flight access to text messaging did not work. Toilet seat on plane would not stay up.

We ended up with seats in the very back. So they did not recline. Have no idea why, we reserved and checked in very early. The isles were very narrow and the seats had very little leg room. But they did give us water, and a snack.

Energetic crew - flight full of swiftied going to Taylor's opening show in Paris! Long lines for bathroom made out kind of suck though

Check in etc was very good. As for on the plane, it was like flying in a freezer. It was so cold, i have flown for years and never been so cold on a plane. Staff on board said its always cold when flying which is a load of rubbish. They wouldnt put any heating on and now i have the flu because of this .

I’ve had a couple flights this week on United that were delayed by an hour or more

Flight was delayed 2.5 hours - a big deal on an overnight when you plan to sleep.

I feel like they have upgraded the app since I last flew United and I found it to be super helpful. I had stopped flying United unless absolutely necessary and my experience on this trip indicates they have been working hard to improve their services.

Surprisingly easy! I was hesitant to try this, but the cost swayed me. I actually felt like I had less stress than all the taxiing and possible delays that occur with short regional flights where you spend less time in the air than getting to and from the plane..

This flight was delayed multiple times and eventually canceled around 2-3ish. Original take off time was around 10:30am. By 3, there were no other options out of Houston, so stuck in Houston for from 3pm - 11am the next day.

Liked - nothing. Disliked - delayed 35+ min sitting on the plane. Caused me to miss my connection in Charlotte. American Airlines is the worst US Air Carrier company with atrocious customer service.

Worst situation ever! I booked my tickets for this trip on Alaska Airlines. I guess AA is a partner and we flew nonstop from Eugene to PHX on an AA jet. I had to pay for luggage from PHX to EUG. And this was an Alaska Airlines reservation paid for with Alaska airlines credit card! Got to the PHX airport and was not able to check bags because of some weird issue with the AA software. My reservation had to be the-entered by the agent. I will never pick another American Airlines flight on the Alaska Airlines website. While on vacation, I tried to upgrade our seats for the trip home. The request just buffered and never went through. I tried four times and was charged four times on my credit card. The card was charged but the seats were never changed. What a wreck!

Left from gate 30 minutes before flight. Never been late to a flight ever. It says 15 minutes before explicitly on the ticket.

I like the boarding process, it was fast. The seat doesn’t have a TV for a long flight and food wasn’t served, just snacks.

Use planes with TVs on flights over 4 hours. The free entertainment was a cheap in between solution for a very long flight that you don't even bother providing meals or decent snacks.

Even though we left CMI late, we mostly made up the time.

Delayed almost 4 hours for a 45 minute flight with no explanation.

Again, multiple delays and I eventually just canceled and drove!

Great crew. Very comfortable business seats with nice bedding. Good food. We were delayed to let late passengers on the flight, but otherwise great experience.

Great crew. We were delayed so that late passengers could get on the flight. Love the bedding in business class. Good food. Great experience.

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.
8/19lun.
1 stopAmerican Airlines
11h 31mSEA-SJU
$141
6/17lun.
2 stopsFrontier
28h 05mSEA-SJU
$170
6/18mar.
2 stopsFrontier
15h 39mSEA-SJU
$179
8/13mar.
1 stopUnited Airlines
12h 38mSEA-SJU
$186
6/7vie.
1 stopSun Country Air
12h 15mSEA-SJU
$219
5/20lun.
3 stopsSpirit Airlines
23h 50mSEA-SJU
$225
9/2lun.
2 stopsDelta
12h 43mSEA-SJU
$227
8/13mar.
3 stopsSpirit Airlines
25h 38mSEA-SJU
$240
6/28vie.
1 stopSun Country Air
12h 15mSEA-SJU
$274
9/2lun.
1 stopDelta
11h 04mSEA-SJU
$283

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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.
5/15mié.
multi-stopUnited Airlines
9h 30mSEA-SJU
5/21mar.
multi-stopUnited Airlines
10h 57mSJU-SEA
$691
5/14mar.
multi-stopAmerican Airlines
12h 25mSEA-SJU
5/21mar.
multi-stopAmerican Airlines
20h 13mSJU-SEA
$739
5/14mar.
multi-stopAmerican Airlines
12h 25mSEA-SJU
5/21mar.
multi-stopAmerican Airlines
12h 24mSJU-SEA
$740
5/15mié.
multi-stopAmerican Airlines
14h 22mSEA-SJU
5/21mar.
multi-stopAmerican Airlines
20h 13mSJU-SEA
$752
5/14mar.
multi-stopAmerican Airlines
12h 25mSEA-SJU
5/21mar.
multi-stopAmerican Airlines
20h 13mSJU-SEA
$754
5/14mar.
multi-stopUnited Airlines
13h 42mSEA-SJU
5/21mar.
multi-stopUnited Airlines
10h 57mSJU-SEA
$755
5/14mar.
multi-stopSpirit Airlines
25h 51mSEA-SJU
5/21mar.
multi-stopSpirit Airlines
28h 45mSJU-SEA
$775
5/15mié.
multi-stopUnited Airlines
9h 30mSEA-SJU
5/20lun.
multi-stopUnited Airlines
12h 27mSJU-SEA
$794
5/15mié.
multi-stopSpirit Airlines
42h 17mSEA-SJU
5/20lun.
multi-stopSpirit Airlines
32h 15mSJU-SEA
$833
5/15mié.
multi-stopSpirit Airlines
42h 17mSEA-SJU
5/21mar.
multi-stopSpirit Airlines
28h 45mSJU-SEA
$876

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Seattle - San Juan Flights

Departure:

Seattle (undefined)United States

Destination:

San Juan (SJU)Puerto Rico

Return flight deals:

San Juan - Seattle

Cabin classes: