Informational Guide to Seattle–Tacoma Airport - Seatac (SEA) - NON OFFICIAL

DL9920 Delta Air Lines - Flight Status

Below, you can find details about Delta Air Lines flight DL9920, which currently operates between the airports of Seattle - Seattle-Tacoma International Airport (Airport Code SEA) and London - London Heathrow Airport (Airport Code LHR).
This flight data pertains specifically to the flight's details for Saturday, December 27, 2025.

DL9920 On Time performance:
n/a
It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions.

Flight Status

DL9920 Delta Air Lines to London

En Route - Delayed
Delay: 18 minutes
Flight Status for Saturday December 27, 2025

Airline information

Delta Air Lines
Delta Air Lines
Equipment: Airbus A330-200

Departure

Seattle (SEA)
December 27, 2025
Seattle-Tacoma International Airport
Departed at:
12:58 pm
Gate:
A11
Scheduled Departure Time: 01:00 pm

Arrival

London (LHR)
December 28, 2025
London Heathrow Airport
Estimated Arrival Time:
06:44 am
Terminal:
-
Gate:
-
Scheduled Arrival Time: 06:26 am
Disclaimer
The information displayed on this website is gathered from third-party providers with a wide reputation on the sector, which in turn obtain the information from the airlines. This data is provided only for informative purposes. www.seattle-airport.com assumes no responsibility for loss or damage as a result of relying on information posted here. Please contact your airline to verify flight status.

Additional Information

Which is the frequency of flight DL9920?
The flight DL9920 is currently not scheduled at Seattle Airport - SEATAC.

Which is the distance of flight DL9920?
The distance between the two airports is 4788 miles.

Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in Seattle: 2025-12-27 15:36:23
Current Time in London: 2025-12-27 23:36:23

Alternative Flights

The following airlines serves the same route between Seattle and London:

British Airways
- Flight Number: BA48. (On Time performance: 57 - Average Delay: 20 minutes)
- Flight Number: BA52. (On Time performance: 84 - Average Delay: 7 minutes)

Delta Air Lines
- Flight Number: DL20. (On Time performance: 75 - Average Delay: 5 minutes)

Virgin Atlantic
- Flight Number: VS106. (On Time performance: 92 - Average Delay: 5 minutes)

Punctuality and delays

It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions.

Delays analyzed by Week: It is not possible to calculate the On-Time Performance for this flight accurately by weekday due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Delays analyzed by Month: It is not possible to calculate the On-Time Performance for this flight accurately by month due to insufficient or non-representative data, as doing so could lead to misleading conclusions

Last Past Flights DL9920

No flights for DL9920 were scheduled in the past month. The last flight took place on Saturday, December 27, 2025