Price observed over the last 3 months for a round trip.
Compare all flight tickets and find cheap flights from Seattle to San Juan
The cheapest flights right now
Seattle – San Juan
Outbound – Nov 9, 2026
1 stop
9h 20m DEN
Return – Nov 23, 2026
1 stop
13h 11m EWR
$717
today
Seattle – San Juan
Outbound – Dec 6, 2026
1 stop
10h 7m EWR
Return – Dec 18, 2026
1 stop
11h 0m DEN
$710
2 days ago
Seattle – San Juan
Outbound – Dec 5, 2026
1 stop
10h 0m ORD
Return – Dec 18, 2026
1 stop
11h 0m DEN
$708
2 days ago
Seattle – San Juan
Outbound – Nov 10, 2026
2 stops
19h 35m LAS
JFK
Return – Nov 24, 2026
2 stops
21h 25m ORD
LAS
$450
today
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Cheapest flight tickets
$385
Average price of a round trip
$633
Average flight ticket price recorded over the last 3 months for a round trip.
Flight duration
30h47
A flight from Seattle to San Juan takes on average 30h47.
Best time
December
According to user searches, the ideal month to go to San Juan is December.
Tips for finding a cheap flight from Seattle to San Juan
Check out our tips for booking your flight to San Juan (Puerto Rico) from Seattle (USA) at the cheapest possible price.
Usually, the cheapest month to pick up a ticket on this route is February, with an average flight ticket price of $399 (calculation over the last two years). The most touristic season corresponds to the months of October, December and February.
For the cheapest flights, it is advisable to buy your ticket at least 37 days before the departure date.
The airline offering the cheapest flight tickets is Frontier Airlines. A ticket from the airline Frontier Airlines to San Juan costs on average $633.
The airlines that offer the most flights are .
Price of flight tickets from Seattle to San Juan
Here is some information and tips to know before booking your flight:
- Flight ticket prices range from $385 to $737
- The average price of a flight ticket is about $633
- Prices are lowest for stays in the month of February
- The month in which booking a ticket is cheaper is: October
info departure city :
Seattle, USA
airports :
Kenmore Air Harbor Spb. (LKE)
Seattle-Tacoma International Airport (SEA)
Renton Municipal Airport (RNT)
King County International Airport (BFI)
local time :
Seattle is a city in the country USA, the time zone is [[timezone]]. In Seattle, it is currently {fromLocalTime}, the temperature is on average 12°C, with a minimum of 9°C and a maximum of 17°C.
The city of Seattle (SEA) has 4 airport(s): Kenmore Air Harbor Spb., Seattle-Tacoma, Renton and King County
destination info :
San Juan, Puerto Rico
airports :
Luis Muñoz Marín International Airport (SJU)
Fernando Luis Ribas Dominicci Airport (SIG)
local time :
San Juan is in the country Puerto Rico, the time zone is [[timezone]]. In San Juan, it is currently {toLocalTime}, the temperature is on average 27°C, with a minimum of 26°C and a maximum of 30°C.
The city of San Juan has 2 airport(s): Luis Muñoz Marín and Fernando Luis Ribas Dominicci
Useful info about San Juan
What is the least touristic period to go to San Juan?
If you want to visit San Juan during the least touristic period, choose the month of December.
What is the most popular time to travel to San Juan?
In San Juan, the most popular month is October. It is during this period that the prices offered by airlines are also the highest.
When should I book my flight from Seattle to San Juan?
According to our data, it is recommended to book your flight 37 days before your departure. If you book your flight ticket 6 weeks before your departure, you may find a price below average. The cheapest day to book a flight from Seattle to San Juan is Tuesday.
What are the arrival and destination airports when traveling between Seattle and San Juan?
When you leave, you can leave from Seattle-Tacoma, and you will arrive at Luis Muñoz Marín.
How to reach Seattle airport from the city centre?
The airport Kenmore Air Harbor Spb. is located 3 km, Seattle-Tacoma is located 16 km, Renton is located 16 km or King County is located 8 km from the city centre. You can access it by using public transportation, taking a taxi, or renting a car.
Are there other means of transportation to go from Seattle to San Juan?
Airplane is the only means of transportation listed on Liligo for this journey.
Are there big differences in weather between Seattle and San Juan?
In summer, the average temperature is 28°C in San Juan and 18°C in Seattle. The average rainfall in summer is 79 mm in San Juan and 38 mm in Seattle. In summer, it is warmer in San Juan and it rains less in Seattle. In winter, it is colder in San Juan and it rains more in Seattle.
