score:3
The minimum required check-in time with checked baggage with Delta is 40 minutes before the scheduled departure time for US domestic flights from SEA (30 minutes without checked baggage), so arriving at the airport one hour before is more than enough, unless perhaps if you're bringing some TSA-unfriendly items or have reduced mobility.
https://www.delta.com/us/en/check-in-security/check-in-time-requirements/domestic-check-in:
When you’re traveling within the United States, we make the suggestion to arrive at the airport at least 2 hours prior to departure. For most airports, you must be checked in at least 30 minutes before your scheduled departure time (airports requiring additional time are listed here, [copied below]) Additionally, you’re required to be at the gate and ready to board 15 minutes before scheduled departure.
Exceptions Minimum Check-In Times by Airport, where the check-in time deadline is >30min:
AIRPORT | DOMESTIC WITH CHECKED BAGS | DOMESTIC W/OUT CHECKED BAGS | ON INTL-BOUND FLIGHT |
---|---|---|---|
Seattle, WA (SEA) | 40 minutes | 30 minutes | 1 hour |
Upvote:5
Depends on your details. Absolutely minimum for me would be 30 minutes (assuming you have PreCheck, PreCheck is open, you have checked in online and no checked bags).
Add more time as needed
Personally I shoot for 1 hour on domestic flights and that has always worked.
Officially SeaTac suggests arriving at least 2 hours early
IMO these recommendations are not worth the paper they're written on. On a recent international departure I arrived early (I had lounge access and wanted to get some work done). Recommended arrival time was 3 hours before departure but the check in counter only opened 2 hours before, so there was a huge line of people standing in front of the closed counter.