Leave-time planning
When Should You Leave for the Airport?
Work backward from your flight: boarding time, airline bag-drop cutoff, TSA line, drive time, parking, and gate walk. Use TSA's 2-hour domestic / 3-hour international floor, then apply your trip specifics.
Flight departs
0:00
Scheduled time is the anchor, not the time to reach the gate.
Gate target
-40 min
Boarding commonly starts 20-30 minutes before departure.
Airport arrival
-2h / -3h
TSA domestic and international arrival floors.
Leave home
Arrival minus drive
Add traffic, parking, shuttle, and rental return time.
Boarding
-25 min
Most U.S. carriers start boarding 20-30 min before departure. Be at the gate at least 15 min before boarding to keep your seat.
Bag cutoff
-30 to -60 min
Airline-set. 30-45 min is typical domestic; 60 min is the international standard. See the per-airline cutoff table.
TSA floor
2 h / 3 h
TSA recommends arriving 2 hours before a domestic flight and 3 hours before an international flight.
Fast rule
Leave earlier than the first deadline you cannot recover from.
A short TSA wait is helpful only if bag drop, boarding, parking, and the drive still fit. The safe leave time is the most conservative deadline after all those dependencies are included.
Before you trust the time
Run these four checks
- Is the airline app showing a bag-drop or document-check cutoff?
- Is TravelTSA showing a high published max wait at your departure airport?
- Will you park, return a rental car, check a stroller, or use an off-site shuttle?
- Does the map ETA cover the time you will actually leave, not the time you checked?
The formula
Leave time, worked backward from scheduled departure
Pick whichever deadline comes first: the TSA floor, your airline's bag-drop cutoff, or your gate-by-boarding target. Then work backward from that deadline.
| Anchor | Offset from scheduled departure |
|---|---|
| Scheduled departure | 0:00 |
| Boarding starts | -25 min |
| Gate by (to keep seat) | -40 min |
| Airline bag-drop cutoff | -30 to -60 min (airline-specific) |
| Through security with buffer | -60 to -90 min (add time for PreCheck or long domestic lines) |
| Curb/parking arrival | -90 to -135 min (TSA floor: -120 domestic, -180 international) |
| Leave home | -(curb) - drive time - traffic buffer |
Leave home = scheduled departure − (TSA floor) − (drive + traffic) − (parking/rental return). Use the greater of the TSA floor and the reverse-engineered gate + bag-drop + line deadline.
The source-backed variables
Use published TravelTSA signals to tune your leave time
Live TSA board
Fresh max-wait, freshness labels, and sparklines for every covered airport.
Flight number lookup
Map a flight number to its departure airport and recommended leave-time window.
How early: TSA + airline cutoffs
Full airline bag-drop cutoff table and the TSA reference.
Airport guides
Terminal and checkpoint detail for 27 covered airports plus regional comparisons.
Official references
TSA and CBP sources
Regional guides
Compare nearby airports before locking in the leave time
Best next step