If you miss a flight in the United States due to security delays, you may not be allowed to board and your ticket will be handled according to airline policies. Security clearance is required before boarding, and delays at checkpoints can affect your ability to reach the gate on time.
Airlines and security operate separately, and delays in one system do not automatically adjust the other.
What happens
If security screening takes longer than expected:
- You may arrive at the gate after boarding has closed
- The airline may not allow you to board the flight
If the flight departs without you:
- Your reservation may be marked as a missed flight
- Remaining segments of your itinerary may be affected
You may be directed to:
- Airline customer service
- Self-service rebooking options
What determines the outcome
The outcome depends on:
- Airline policy and ticket type
- Whether you checked in or arrived on time
- Availability of seats on later flights
- Whether the delay is considered within airline control
If flexibility is available:
- You may be rebooked on another flight
If not:
- Additional fees or fare differences may apply
What it may lead to
Common outcome:
- Rebooking on a later flight
- Travel delay
Possible escalation:
- Additional costs for new tickets or changes
- Missed connections affecting the rest of the trip
Worst realistic outcome:
- Loss of ticket value for non-refundable fares
- Significant travel disruption
- Additional accommodation or transportation expenses
Security delays can affect travel plans even when passengers arrive early.
Common escalation triggers
- Long lines or secondary screening
- Peak travel times
- Tight connection schedules
- Unexpected delays at checkpoints
What this depends on
Outcomes may vary based on:
- Airline policies
- Airport conditions at the time
- Type of ticket purchased
- Timing of arrival at the airport
Security wait times can change quickly and are not always predictable.
Who controls the process
TSA manages security screening.
Airlines control boarding and ticket policies.
Rebooking and compensation decisions are made by the airline, not by security authorities.
Last reviewed: April 2026
This page describes typical operational outcomes. Individual cases vary.