Killeen Regional Airport / Robert Gray Army Airfield
Fort Cavazos, United StatesGRK / KGRK
Regional airport · 28 direct destinations · 1 runway · longest runway 9,997 ft
61 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Route
Fort Cavazos → Portsmouth
GRK
Fort CavazosKilleen Regional Airport / Robert Gray Army Airfield
Fort CavazosKilleen Regional Airport / Robert Gray Army AirfieldPSMPortsmouthPortsmouth International Airport at Pease
PortsmouthPortsmouth International Airport at Pease- Distance
- 1,693 mi
- Estimated flight time
- ~3h 55m
Portsmouth is currently 1 hour ahead of Fort Cavazos.
Observed nonstop
How often does this route fly?
Frequency
Daily at most
On average around 1 flights a day, observed from October 2025 to September 2026.
- 1
- flights per day
- 2
- busiest month · Jan
- 1
- quietest month · Oct
- 3 hr 15 min
- measured flight time
- 4 / 12
- months seen
Through the year
Per day, month by month
- 2Jan2026
- –Feb
- –Mar
- 1Apr
- –May
- –Jun
- 1Jul
- –Aug
- –Sep
- 1Oct2025
- –Nov
- –Dec
Airlines
Who flies it
US Air Forcenow and then
Atlas Airnow and then
Through the day
Departure times
Local time in Fort Cavazos. Most departures between 19:00 and 22:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 0Mon
- 0Tue
- 0Wed
- 0.1Thu
- 0Fri
- 0.1Sat
- 0Sun
Fleet
Aircraft observed
- C1746%
- Boeing 767-300B76323%
- Boeing 747-400B74415%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 2 | 7 |
|
| February 2026 | Not seen in this month. | ||
| March 2026 | Not seen in this month. | ||
| April 2026 | 1 | 2 |
|
| May 2026 | Not seen in this month. | ||
| June 2026 | Not seen in this month. | ||
| July 2026 | 1 | 2 |
|
| August 2026 | Not seen in this month. | ||
| September 2026 | Not seen in this month. | ||
| October 2025 | 1 | 2 |
|
| November 2025 | Not seen in this month. | ||
| December 2025 | Not seen in this month. | ||
Airlines observed on this route
From observed callsign routes on GRK-PSM - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The longest observed direct route from GRK.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Fort Cavazos: 28.
- Direct destinations observed from Portsmouth: 16.
The airports on this route
Portsmouth International Airport at Pease
Portsmouth, United StatesPSM / KPSM
Regional airport · 16 direct destinations · 1 runway · longest runway 11,322 ft
55 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
About the route from Fort Cavazos to Portsmouth
The observed direct connection between Killeen Regional Airport / Robert Gray Army Airfield (GRK) and Portsmouth International Airport at Pease (PSM) covers approximately 1,693 mi. The estimated flight time is around 3h 55m. Atlas Air and US Air Force have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Fort Cavazos from Portsmouth by air?
- The great-circle distance between Killeen Regional Airport / Robert Gray Army Airfield and Portsmouth International Airport at Pease is approximately 1,693 mi.
- How long is the flight from Fort Cavazos to Portsmouth?
- Based on the distance, the estimated flight time is about 3h 55m. This is an estimate, not a schedule.
- Is there a direct connection from Fort Cavazos to Portsmouth?
- Yes, a direct connection between GRK and PSM has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Atlas Air and US Air Force.
- How often is there a flight from Fort Cavazos to Portsmouth?
- On average around 1 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 13 observed flights. Mainly US Air Force, Atlas Air. That is an observation, not a timetable.
- What is the current time difference between Fort Cavazos and Portsmouth?
- Portsmouth is currently 1 hour ahead of Fort Cavazos.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.