How do I contact a Flight Service Station (FSS) in the United States in order to receive weather information or open a flight plan after I've already departed.

  • $\begingroup$ You can also open flight plans with the tower or local approach control. $\endgroup$
    – Dave
    Commented Aug 2, 2016 at 14:19
  • $\begingroup$ @Dave, you cannot "open" or "file" VFR flight plans with ATC. You can only do that with FSS. You can request flight following with ATC, but we have zero interaction with the "VFR flight plan" system. $\endgroup$
    – randomhead
    Commented Jul 13, 2021 at 20:27

1 Answer 1


For filing and opening VFR flight plans, pushing back your ETA because of a delay, and a few more obscure things which you can find in section 4-1-21 of the AIM you would contact Flight Service (addressed as "region Radio" - e.g. "New York Radio" or "Bridgeport Radio")

The universal flight service frequency is 122.2, and above 5000 feet you should be able to get someone on that frequency, but it's not guaranteed.

If yo can't raise someone on 122.2, or you're below 5000 feet, there are local Flight Service frequencies are listed on VORs as shown below. As a general rule if you can receive the VOR you can talk to Flight Service with the frequencies listed, and using these local frequencies helps avoid congestion on the universal frequency.

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Initial calls to Flight Service should take the form:
<Facility Name> Radio, Cessna 12345, 5 northeast of Hampton VOR
(as above for Flight Watch, Who you're talking to ("New York Radio" in the example above), Who you are, and Where you are.)

There's a little catch with Flight Service frequencies: If there is an R after the frequency (as shown for 122.1 here) it is a receive-only frequency. You will talk to flight service on that frequency, but you will listen to the VOR's audio channel to hear Flight Service's responses.
When you call Flight Service using one of these frequencies make sure your nav radio is tuned to the VOR and the voice channel volume is up, and let them know which VOR you're listening to as opposed to your location.
In this example if you were contacting Flight Service on 1221 the call would be New York Radio, Cessna 12345, receiving on Hampton VOR.

For weather (giving PIREPs or asking for a weather report) you will also talk to Flight Service: There used to be a separate service (Flight Watch) and frequency for this, but weather-related tasks were consolidated into the general Flight Service frequency in late 2015.

Radio coverage and contact procedures are identical to what was mentioned above for dealing with flight plan stuff, but you should make it clear you're looking for weather updates (add "requesting enroute weather") or that you want to give a PIREP (add "With a pilot report") so the Flight Service Specialist on the other end of the radio knows what you're looking for.

As weather is generally a localized phenomenon (and weather updates or PIREPs can take some time to relay) it is probably be a good idea to use the local flight service frequencies for weather-relatedrather than the universal 122.2 frequency to avoid congestion there, though I don't believe the FAA or Flight Service has issued any official guidance on this since Flight Watch was consolidated with the rest of Flight Service.

  • $\begingroup$ Are the Flight Service frequencies available 24 hours a day? $\endgroup$
    – Magnetoz
    Commented Jan 31, 2014 at 19:18
  • $\begingroup$ @Magnetoz The Flight Service frequencies (122.2 and the ones published on VORs) are 24/7. There are some "part time flight service stations" but their frequencies are supposed to be switched to a 24-hour station when the local station is closed. (If that doesn't happen or you don't get an answer you can always try on 122.2 - Worst case Flight Service will sometimes ask you to switch to a discrete frequency if 122.2 is congested.) $\endgroup$
    – voretaq7
    Commented Jan 31, 2014 at 19:24
  • $\begingroup$ Just an update: Flight Watch was absorbed into Flight Services this month. I think the 122.0 frequency still exists. $\endgroup$ Commented Oct 10, 2015 at 0:12
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    $\begingroup$ @EdwardFalk Yup, I forgot I wrote this answer - I guess I should edit it :-) $\endgroup$
    – voretaq7
    Commented Oct 10, 2015 at 2:31
  • 1
    $\begingroup$ @EdwardFalk 122.0 is being phased out effective Oct 1 2015. If you call up on that frequency, Flight Service (for now) will advise you of such. In the next several months, it will become unmonitored. 122.2 will still be available for all services. $\endgroup$
    – newmanth
    Commented Oct 12, 2015 at 4:48

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