Searching on United.com we found flights departing SEA on Wednesday, February 28 and returning from SJU on Tuesday, March 6, 2018. Travel is available from mid-February through May 9, 2018, any day of the week if available.
See our Seattle SEA listings for a complete look at current finds.
Need a hotel in San Juan? Here's what is available for the listed travel dates on Hotelwatchdog.