NAVAL AIR STATION KEFLAVIK

OVERVIEW

Naval Air Station Keflavik is a North Atlantic rotational facility on Iceland's Reykjanes Peninsula, operated by the United States Navy and NATO partners as a tenant on the Icelandic Coast Guard's Keflavik Air Base. Unlike every other base in this directory, NAS Keflavik does not have a permanently stationed U.S. force or assigned families today — it is a rotational facility designed to support deploying U.S. and allied detachments rather than a forward-stationed garrison.

The base's enduring strategic value is its position astride the Greenland–Iceland–United Kingdom (GIUK) Gap, the maritime chokepoint through which Russian Northern Fleet submarines and surface ships must transit between their Norwegian Sea operating areas and the open North Atlantic. From 1951 through 2006, NAS Keflavik was the principal NATO base for monitoring this transit, hosting U.S. Navy P-3 Orion patrol squadrons, U.S. Air Force F-15 interceptors, and the standing Iceland Defense Force.

The 2006 U.S. withdrawal closed the permanent garrison, but rising Russian submarine activity in the North Atlantic prompted the United States and Iceland to sign a 2016 Joint Declaration restoring rotational use of Keflavik. Today the base hosts continuously rotating P-8A Poseidon maritime patrol detachments under Commander, Task Force 67, NATO Air Policing fighter rotations, and a growing number of bilateral and multilateral exercises. Permanent U.S. military and family presence is intentionally not part of the rotational footprint.

KEY FACTS

• Rotational, Not PermanentContinuously operating U.S. base from 1951 to 2006; today operates as a NATO and U.S. rotational facility — no permanently stationed U.S. force or assigned families
• GIUK Gap AnchorSits astride the Greenland–Iceland–U.K. (GIUK) Gap — the principal North Atlantic chokepoint for Russian submarine and surface transit between the Norwegian Sea and the open Atlantic
• Forward Operating SiteU.S. Navy's primary forward operating site for North Atlantic P-8A Poseidon maritime patrol operations under Commander, Task Force 67
• Iceland Has No MilitaryIceland is a NATO founding member with no standing armed forces; the host installation is operated by the Icelandic Coast Guard. U.S. presence rests on the 1951 bilateral defense agreement
• Co-located with International AirportThe military airfield shares its runways with Keflavík International Airport — Iceland's main civilian gateway

HISTORY

Iceland's strategic position in the North Atlantic made it a critical Allied stepping stone in the Second World War. Following the German occupation of Denmark and Norway in April 1940, British forces occupied neutral Iceland in May 1940 to deny it to Germany. Under a May 1941 defense agreement, U.S. forces — at the time still officially neutral — relieved the British garrison in July 1941, several months before Pearl Harbor. The U.S. Navy and Army built the first modern airfield at Keflavik on the open Reykjanes lava plain west of the capital Reykjavík, supporting transatlantic ferry routes for combat aircraft bound for Britain and U-boat patrols across the North Atlantic.

After the war the U.S. withdrew its forces from Iceland in 1947, but the deepening Cold War quickly reversed the trend. Iceland was a founding member of NATO in 1949, and in 1951 the United States and Iceland signed a bilateral Defense Agreement under the NATO framework, establishing the Iceland Defense Force at Keflavik with the U.S. Navy as the lead service. Iceland, which has no standing armed forces, agreed to host U.S. and allied forces in exchange for its NATO defense guarantee. The facility was formally redesignated Naval Air Station Keflavik in 1961.

Throughout the Cold War, NAS Keflavik was one of NATO's most important maritime patrol bases. U.S. Navy patrol squadrons rotating through Keflavik flew thousands of sorties annually tracking Soviet Northern Fleet submarines transiting the GIUK Gap. U.S. Air Force F-102, F-4, and (from 1985) F-15 interceptors based at Keflavik enforced air sovereignty over Iceland, and a comprehensive radar network watched the approaches to the North Atlantic. At its peak the Iceland Defense Force numbered roughly 3,000 U.S. military personnel and 2,000 American family members.

The collapse of the Soviet Union dramatically reduced the patrol mission. Submarine and surface transit through the GIUK Gap fell to a fraction of Cold War levels, and successive U.S. defense reviews concluded that the Iceland Defense Force could not be justified. After protracted bilateral negotiations, the United States announced in 2006 that it would close the permanent Iceland Defense Force. The last F-15s departed in September 2006 and the last permanent U.S. forces left Keflavik on September 30, 2006. The base reverted to the Icelandic government, and the Icelandic Coast Guard assumed responsibility for the airfield. The Keflavík International Airport — co-located with the military side — continued normal civilian operations.

Russian military activity in the North Atlantic began climbing again in the early 2010s. Renewed Russian Northern Fleet submarine deployments to the Atlantic, increased long-range bomber sorties, and the broader deterioration of NATO–Russia relations after the 2014 annexation of Crimea drove a reassessment. In 2016, the United States and Iceland signed a Joint Declaration formalizing rotational U.S. and NATO use of Keflavik. The U.S. Navy began regular P-8A Poseidon patrol detachments to Keflavik in 2018, and the U.S. funded a major hangar upgrade ($14.4 million) and runway rehabilitation. NATO Air Policing Iceland brought rotating allied fighter detachments back to the airfield. By the early 2020s, Keflavik had become one of NATO's most actively used rotational airfields — without restoring the permanent garrison or family footprint of the Cold War era.

MAJOR COMMANDS & TENANT UNITS

• Commander, Task Force 67 (Patrol and Reconnaissance Forces, U.S. 6th Fleet) rotational P-8A Poseidon detachments
• NATO Air Policing Iceland — rotational allied fighter detachments (host airfield)
• Icelandic Coast Guard / Landhelgisgæslan (host)
• NATO Cooperative Cyber Defence and Joint Force Command Norfolk supporting elements (rotational)

LOCATION & GEOGRAPHY

HOST NATION CONTEXT

NAS Keflavik operates under the NATO Status of Forces Agreement (London 1951) and the bilateral U.S.–Iceland Defense Agreement signed the same year. The 2006 Joint Understanding and the 2016 Joint Declaration on Defense Cooperation govern the modern rotational arrangement. Iceland, as a NATO founding member with no standing armed forces, depends on the alliance — and on the bilateral defense agreement with the United States — for its national defense.

The Icelandic Coast Guard (Landhelgisgæslan) operates the Keflavik Air Base and provides host-nation support to all visiting U.S. and NATO units. The Icelandic Ministry for Foreign Affairs maintains the bilateral defense relationship with the United States. There is no equivalent of Host Nation Support funding because the U.S. presence is rotational rather than permanent; instead, U.S. units deploy with their own logistics tail and reimburse the Icelandic Coast Guard for facility use.

Because Keflavik is a rotational facility, U.S. service members deploying to the base do so on temporary duty (TDY) orders — typically without accompanying family members and without command sponsorship requirements. Iceland is a Schengen Area member; U.S. military personnel transit on regular passports with appropriate orders, and civilian visitors hold standard Schengen-area visa-waiver entries. The local language is Icelandic; English is universally spoken in Reykjavík and the Reykjanes Peninsula.

NOTABLE EVENTS

1. 1941
   U.S. Wartime Arrival

   Following the May 1941 U.K.–Iceland defense agreement, U.S. forces relieve British troops in Iceland in July 1941 — building the first major airfield at Keflavik to support transatlantic ferry routes and anti-submarine patrols.
2. 1951
   Bilateral Defense Agreement

   United States and Iceland sign a bilateral Defense Agreement under the NATO framework. The Iceland Defense Force is established at Keflavik with U.S. Navy as the lead service.
3. 1961
   Naval Air Station Keflavik

   Facility formally redesignated as Naval Air Station Keflavik. Through the Cold War, NAS Keflavik is the principal NATO maritime patrol base for monitoring Soviet submarine activity transiting the GIUK Gap.
4. 2006
   U.S. Withdrawal

   United States closes the permanent Iceland Defense Force at Keflavik on September 30, 2006. Permanent U.S. forces, F-15 fighters, and P-3 Orion patrol aircraft depart; the base reverts to Icelandic government and Coast Guard control.
5. 2016
   Rotational Reopening

   United States and Iceland sign a Joint Declaration on defense cooperation, formalizing rotational U.S. and NATO use of Keflavik. P-8A Poseidon detachments and a $14.4M U.S. funded hangar upgrade restore Keflavik as a forward operating site.

NEARBY BASES

FREQUENTLY ASKED QUESTIONS

SOURCES

• Wikipedia: Naval Air Station Keflavik
• Wikipedia: Iceland Defense Force
• U.S. Department of State — U.S. Relations with Iceland
• U.S. 2nd Fleet — North Atlantic