No, you do not have enough time. The light rail is your most reliable transport from the train station to the airport. You should figure that that trip will take and hour. That leaves less than half an hour to get from the station to the terminal, through security and to your gate. I figure your odds are at least 10 to 1 against.
No, not enough time. from International District station the Light Rail trip is about 35 minutes to SeaTac. But you might have to wait 10 mins for the next train to arrive. Plus say another 10-15 mins to walk from the train station TO the light rail station. So you're already at 1 hour. At SeaTac the station is a good 10-15 mins. walk to get over to the terminal.
15 mins. is not enough time to check in for a flight at SeaTac!
no.....assuming the train is reliable and arrives when scheduled,
With TSA PRE and assuming no N gate departure, 90 minutes from Int Distric to SEATAC is doable via LINK Light Rail, if pressed for time just take UBER/LYFT.
I regularly leave 90 minutes prior and take LINK, its 38 minutes to SEATAC.
As others have stated, it'll take the better part of an hour to get from downtown to SeaTac via light rail. TSA recommends arriving at SeaTac two hours early to check in, get through airport security, etc. While there are stories of people making heroic (extremely short) journeys to the airport and through security, there are far more of people who ended up missing their flight because they cut things too close. Good luck!
I don't see anything in the original post that mandates light rail... IF the train is on time at 11:00 from Vancouver, the OP could grab a taxi and be at SeaTac well before 11:30. Usually 30 minutes is more than enough to get through security and the OP would still have time before the flight started boarding..Edited: 28 December 2017, 03:31
I won't say it is impossible, it is barely possible, but it is very risky. If one thing goes wrong you are out of luck.
One thing that hasn't been mentioned is airline requirements to be at the gate. For Alaska, the major carrier here, you are required to be at the gate 30 minutes before departure. They will button up the plane and be ready to push back as soon as possible. I have seldom seen an Alaska flight that starts loading on time at SEA still open at departure time. It is likely to be closed up 10 minutes before "scheduled departure." Roll up at 12:20 and find boarding complete, say well departure wasn't until 12:30, the gate agent will tell you you were supposed to be there by 12:00.Edited: 28 December 2017, 21:27
Sure, they can try to do it in a taxi. Might work.
Even a taxi is cutting it very close. Partly because I do not trust Amtrak at all. Partly because there could be a serious accident that slows the taxi way down.
I'd take a later flight by 1.5 hours or go down on the train the evening before.