Most delays getting into Sri Lankan airspace come from applying for the wrong permit, or applying for the right one too late. The distinction is simple once you have seen it, and the notice periods are not what most operators assume.

Start here.

Which permit does your flight need?

Your operation	Permit required	Notice (AIP GEN 1.2 / CAASL)	Issued by
Transiting the Colombo FIR, no landing	Overflight permit	3 days	CAASL
Landing for fuel/tech only, nobody on or off	Technical stop permit	3 days	CAASL
Non-scheduled Commercial Passenger Landing	Landing permit	30 days	CAASL
Non-scheduled Commercial Cargo Landing	Landing permit	7 days	CAASL
Private / Corporate Aviation Landing	Landing permit	7 days	CAASL
Other non-scheduled landing (incl. ferry/positioning)	Landing permit	7 days	CAASL
Air ambulance / Medevac / Relief	Landing permit, expedited	“At the earliest” (hours)	CAASL
State, military or VVIP	Diplomatic clearance	Weeks	Ministry of Foreign Affairs, then CAASL
Block/seasonal overflight (operational practice)	Block overflight permit	Typically 14 days; confirm with CAASL	CAASL

The primary dividing line for lead times is traffic and commercial category, not just whether the wheels touch the ground. A fuel stop where nobody boards and nothing is loaded is a technical stop, running on a 3‑day timeline.

However, if you are bringing in a non‑scheduled commercial passenger flight, CAASL requires a full 30 days notice. Cargo and private landing flights require 7 days.

Miscategorizing a flight—such as treating a passenger charter as a simple private landing or treating a crew‑change flight that embarks/disembarks crew as a tech stop—is the fastest way to get an application rejected or delayed.

Working days, and why that matters more in Sri Lanka

AIP GEN 1.2 states minimum notice in days; CAASL processes non‑emergency applications during office hours on working days only. In practice, operators should plan using working days and allow for weekends and public holidays.

Two factors make planning in Sri Lanka unique:

1. The standard working week is Monday to Friday. CAASL’s permit desk does not process non‑emergency applications on Saturday or Sunday.caa+1
2. Sri Lanka observes roughly 25 to 26 public holidays a year. Thirteen of them in 2026 are Poya (Full Moon) days, which fall monthly across the calendar.

2026 Poya days: 3 January · 1 February · 2 March · 1 April · 1 May · 30 May · 29 June · 29 July · 27 August · 26 September · 25 October · 24 November · 23 December. (Verify against the official Sri Lankan public‑holiday calendar when finalising schedules.)

On top of Poya days sit Independence Day, Sinhala and Tamil New Year (13–14 April), Good Friday, Deepawali, Christmas, and Islamic holidays. In practice, an average month contains two to three non‑working days beyond standard weekends.

The practical math: A 7‑day cargo permit application submitted on a Wednesday afternoon will not clear the following Wednesday—it will clear eleven to twelve calendar days later once two weekends and an intervening Poya day are factored in. Count actual working days on a Sri Lankan calendar before confirming a schedule to an owner or charterer.

When the clock actually starts

The notice period begins only when CAASL holds a complete application, not when you first make contact. An application missing an insurance certificate or noise declaration has not started its countdown; the clock begins the moment the final required document is verified.

This is the single most common cause of permit delays, and it is entirely avoidable.

Validity, Re‑clearance, and Revisions

Per Sri Lanka AIP GEN 1.2, a flight clearance or re‑clearance remains valid for 48 hours from the intended time of operation.

If actual operations are delayed beyond this 48‑hour window, the original permit expires, and a fresh re‑clearance must be obtained quoting the original Flight Clearance Number (FCN). Any delay or cancellation within 2 days of the planned operation must be notified to flightpermission@caa.lk.

Additionally, a permit must be revised prior to operation if any of the following parameters change:

• Aircraft registration or callsign (permits are airframe‑specific and do not transfer)
• Destination or ATS routing
• Colombo FIR entry or exit points
• Purpose of flight (e.g., converting a technical stop to a traffic landing)
• Aircraft operator

The aircraft swap trap: A permit issued for tail N123AB is void for tail N456CD. If a maintenance issue forces an aircraft swap outside CAASL office hours on a Friday, the flight cannot operate until a revision is processed. If a tail swap is possible, notify your handling agent or CAASL during the initial filing.

Office hours, weekends, and short notice

CAASL Air Navigation Services (ANS) office hours are 0300Z to 1045Z, Monday to Friday (08:30 to 16:15 Sri Lanka Time, UTC+5:30).

• Standard Submission Desk: flightpermission@caa.lk (primary), scaiais@caa.lk, caiais1@caa.lk, caiais2@caa.lk.
• After‑Hours & Emergency Channels: For urgent after‑hours revisions, AOG, or medical flights, applications sent to flightpermission@caa.lk must be followed up with the CAASL Non‑Scheduled Duty Officer via mobile at +94 77 666 9416 or +94 77 666 9788.

Applications submitted at 1200Z on a Friday without direct duty‑officer escalation will not be reviewed until Monday morning (or Tuesday if Monday is a public holiday).

Medevac & Relief Exception: Air ambulance and Search & Rescue (SAR) flights operate under expedited emergency rules. Processing within hours is achievable provided complete medical reports, treating physician details, and receiving hospital confirmations are supplied.

What gets an application rejected or delayed

In order of frequency:

1. Incomplete document set: The notice clock does not begin until all files are submitted.
2. Non‑compliant insurance: Insurance certificates that do not cover operations into/over Sri Lanka, have expired validity, or fall below required liability limits.
3. Flight plan mismatch: ATS routing or Colombo FIR entry/exit fixes in the application that do not match the filed ICAO flight plan.
4. Undeclared cargo details: Cargo flights missing detailed manifests, consignor/consignee information, or undeclared Dangerous Goods (NOTOC).
5. Unnotified aircraft swaps: Operating a different tail number without a formal permit revision.

Flight Plan Entries and UPRs

When filing your ICAO Flight Plan:

• Item 18 Requirements: The CAASL Flight Clearance Number (FCN) must be entered in Item 18 under RMK/ (e.g., RMK/CAASL PERMIT SL/OC717-18/AS/21/02), as instructed in the clearance. Omitting the permit reference will lead to air traffic delays or denial of FIR entry.
• User Preferred Routes (UPRs): Operators intending to fly User Preferred Routes through the Colombo FIR require separate ATC approval. Specific altitude bands, equipment requirements (e.g., RNP, ADS‑C, CPDLC) and lead times are set by CAASL/ATC and should be confirmed when planning UPRs.

Where SEAS fits

We file permit applications directly with CAASL on behalf of visiting operators. Working with a local ground handler changes the workflow:

• Pre‑filing audit: We verify the document package against current CAASL standards before submission, ensuring your notice clock starts on day one.
• Calendar coordination: We audit your schedule against Sri Lanka’s public and Poya holiday calendar to set realistic operational expectations.
• Proactive revisions: Tail swaps, schedule shifts, or FIR entry changes are routed immediately through CAASL channels.
• 24/7 Monitoring: We maintain contact with CAASL duty officers outside standard office hours to manage AOGs, emergency reroutes, and short‑notice revisions.

Request a permit or handling →

Frequently Asked uestions

How far in advance do I need a Sri Lanka permit?
Allow 3 days for overflights and technical stops, 7 days for cargo or private landings, and 30 days for non‑scheduled commercial passenger landings. These should be calculated as working days—Saturdays, Sundays, and Sri Lanka’s 25+ annual public holidays (including 13 Poya days in 2026) do not count. The clock starts when CAASL holds a complete application.

Can a permit be revised after it has been issued?
Yes, but revisions must be submitted to CAASL prior to the flight. Permits carry a 48‑hour validity window from the intended operational time. Beyond 48 hours, or if there are changes to aircraft registration, routing, FIR entry/exit fixes, flight purpose, or operator, a formal re‑clearance is required.

Do I need an overflight permit for a technical stop?
No—a technical stop requires a technical stop landing permit. It operates on a 3‑day notice timeline (the same as an overflight) provided no passengers or cargo are embarked or disembarked. If any traffic comes on or off, it is reclassified as a landing permit (requiring 7 to 30 days notice depending on flight type).

What happens if my schedule changes after the permit is issued?
A schedule change within 48 hours of the approved operational time is generally covered by the existing permit, provided the route and tail number remain identical. Outside that window, or if FIR entry points change, a formal revision must be filed with flightpermission@caa.lk.

Can I apply for a permit over the weekend?
Standard non‑scheduled permit processing occurs Monday through Friday between 0300Z and 1045Z. Non‑emergency applications submitted on Friday evening will be processed on Monday (or Tuesday if Monday is a Poya or public holiday). Emergency medevac and SAR flights are exempt and handled 24/7 via duty officer channels.

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Reviewed August 2026 by SEAS Operations Team, Sri Lanka Executive Aviation Services. Permit requirements, notice periods, and the Sri Lankan holiday calendar change. Confirm current requirements before planning against this page, or contact our operations desk.