Isle of Man Airport (Manx: Purt Aer Vannin, also known as Ronaldsway Airport) (IATA: IOM, ICAO: EGNS) is the main civilian airport on the Isle of Man. It is located in the south of the island at Ronaldsway near Castletown, 6 nautical miles (11 km; 6.9 mi) southwest of Douglas, the island's capital. Along with the Isle of Man Sea Terminal, it is one of the two main gateways to the island. The airport has scheduled services to the United Kingdom and the Republic of Ireland.

Ronaldsway was first used as an airfield in 1928 with passenger services to the UK starting in 1933, operated by Blackpool and West Coast Air Services (later West Coast Air Services). Further services were established by Aer Lingus and Railway Air Services (RAS) from 1934. From 1937 RAS operations from Ronaldsway to the UK were transferred to Isle of Man Air Services. In a 1936 expansion of the Ronaldsway Airport, workers discovered a mass grave believed to hold the remains of soldiers who died during the Battle of Ronaldsway in 1275.

The airfield came under Royal Air Force control at the outbreak of the Second World War. Known as RAF Ronaldsway, it was one of the few airfields that continued operating civilian flights throughout the wartime period.

The airfield was used by № 1 GDGS (Ground Defence and Gunnery School) operating Westland Wallace aircraft, the drogues from these aircraft being fired on from gun emplacements on St Michael's Isle (Fort Island) and Santon Head. An expansion of the airport during the War led to the discovery of the archaeological remains of a Neolithic settlement belonging to what is now called the Ronaldsway culture, in honour of this site.

RAF operations continued until 1943 when the airfield was handed over to the Admiralty for further development as a Fleet Air Arm training station.

Now a naval air station, RNAS Ronaldsway, the airport was taken out of commission in 1943 for almost twelve months of extensive development undertaken by John Laing & Son. By the summer of 1944 the airfield had evolved from a grass landing area with a few hangars to a four runway airfield with the infrastructure to house and operate three training squadrons using Barracuda torpedo bombers.

Commissioned as HMS Urley (Manx for Eagle) by the Admiralty on 21 June 1944, with accounts handled by HMS Valkyrie, flying recommenced on 15 July 1944. The airfield's main role was that of a torpedo working-up station. No. 1 OTU consisted of 710, 713 and 747 Squadrons (Fleet Air Arm) and these operated until the cessation of hostilities in 1945. The base was paid off on 14 January 1946, and transferred to 'Care and Maintenance' under HMS Blackcap. The nominal depot ship from 21 June 1944 was a 32' cutter named XXII, which itself was constructed in 1937.

The airport reverted to solely civilian flying almost immediately after the war, but the airfield remained in Admiralty possession until sold to the Isle of Man Government for £200,000 in 1948, far short of the £1 million that the UK Government had spent on constructing the airport buildings and runways, plus the £105,000 that was paid by the Admiralty in 1943 to purchase the site. Several Manx-based airlines were formed in the early postwar years to operate scheduled and charter services to the UK mainland.

A project by Ellis Brown Architects began in November 1998 to extend the airport and improve the facilities available to passengers. In March 2000 the new extension was opened, providing a new landside catering outlet, arrivals area, baggage hall, and departure lounge. The existing part of the airport was refurbished during this time to provide improved check-in facilities and offices, linked to the extension with a new airport entrance. During the extension and renovation period, the iconic Three Legs of Man sculpture adorning the airport's façade was also refurbished. In March 2006 funding for a further extension was granted by Tynwald to increase the number of departure gates, with work due for completion in summer 2007.

In April 2008 Tynwald granted a major runway extension and resurfacing project at the airport. The runway will be extended by 245 m (804 ft) out into the Irish Sea by the construction of a rock-armoured promontory. It was part of a £44m plan which also included resurfacing of the runway during summer 2008 and the extension program that will commence in spring 2008 work was completed by early 2011. It has emerged that the actual runway take-off length was underestimated by 160 metres in the £1.5 million feasibility study. Whilst the study originally looked into the aviation marketing implication of runway length, airport management has now denied that the extension is for the use of heavier aircraft in the future, stating that the resurfacing and extension are to comply with the latest international safety standards.

There has been a significant overspend on the project due to poor foreign exchange management of the Euro-denominated components of the costs. It is thought that the Manx Treasury Minister may have been referring to the expense of the runway and the additional £6,515,000 control tower project when he stated in his 2009 Budget speech that the Isle of Man could no longer afford "Rolls-Royce" projects. Following the completion of the runway extension project the largest aircraft that can operate fully at Ronaldsway is the Boeing 757.

In September 2019, Flybe announced it would shut down its base operations at the airport by Spring 2020.

The Isle of Man airport has one terminal with 5 gates, all of which are hardstands. Airside, there is a lounge operated by Menzies Aviation that can be accessed by passengers for a fee. There is also a duty free, a bar and a Costa Coffee café.

The following airlines operate regular scheduled flights to and from the Isle of Man as of 2024:

Airlines	Destinations
Aer Lingus	Dublin
Blue Islands	Jersey
easyJet	Liverpool, London–Gatwick, Manchester Seasonal: Bristol
Loganair	Birmingham, Edinburgh, Liverpool, London–City, London–Heathrow, Manchester, Newquay

Now-defunct regional airlines Citywing and Manx Airlines had their head offices on the airport property. The Manx Military and Aviation Museum is situated next to the airport and has exhibits and information about the history of aviation on the island.

Year	Passenger numbers
	Total	% change
2014	729,703	-
2015	781,601	7.1%
2016	791,651	1.3%
2017	797,615	0.8%
2018	787,257	1.3%
2019	854,676	8.6%
2020	162,898	80.9%
2021	182,371	12.0%
2022	562,490	208.4%
2023	649,342	15.4%

Busiest routes to and from Isle of Man Airport (2023)

Rank	Airport	Passengers handled	% change
1	Liverpool	171,419	11.1%
2	London-Gatwick	159,721	6.6%
3	Manchester	119,529	24.3%
4	Dublin	38,738	53.2%
5	London-Heathrow	33,182	62.9%
6	Bristol	27,081	12.1%
7	Birmingham	20,033	10.5%
8	Belfast-International	19,975	9.3%
9	London-City	18,266	7.2%
10	Edinburgh	11,220	15.4%

Bus services are provided by Bus Vannin, formerly Isle of Man Transport, to Douglas, Castletown, Colby, Port Erin, Port St Mary, Peel, St John's, Foxdale and Castletown.

Ronaldsway railway station on the Isle of Man Railway is roughly 600 metres walk from the airport, and is sometimes used by air passengers.

In common with most international airports, the Isle of Man Airport maintains its own fire service. This service cooperates closely with the Isle of Man Fire and Rescue Service, although it is independent, with its own management and chief officer. For joint operational purposes, and for the assigning of radio call signs to appliances, the airport fire station is known as "station 9", in a common series with the IoM Fire & Rescue Service, whose seven fire stations are numbered from "station 1" to "station 7" inclusive. The airport fire station is a large five-bay purpose-built structure with duty rooms and offices. The service operates a fleet including two Carmichael Cobra 2 major foam tenders, a third (smaller) major foam tender, a standard duty pump (principally for building fires), and a 4x4 Land Rover. A further major appliance (Iturri Torro) is on order.

The Isle of Man Airport Police was a small independent police service providing security and policing at the airport site, with warranted constables, known as "aviation security officers" (ASO). Under Manx law ASOs had full police powers, including the power of arrest, whilst on airport property. For major crimes the airport police was supported by the Isle of Man Constabulary. The airport police were disbanded at the end of September 2019, with the responsibility for airfield security passing to a private contractor.

• On 26 January 1935, Hillman's Airways de Havilland Dragon Rapide G-ACPO, operating a mail flight from Aldergrove Airport, Belfast to Stapleford Aerodrome, Abridge, Essex via Speke Airport, Liverpool, Merseyside crashed at Derbyhaven, Isle of Man, whilst attempting to divert to Ronaldsway during bad weather.
• On 23 March 1936, United Airways Spartan Cruiser G-ADEL crashed at Ronaldsway. The aircraft was operating a mail flight from Hall Caine Airport, Ramsey. The aircraft was dismantled and departed the island on board SS Conister of the Isle of Man Steam Packet Company. It was repaired by its manufacturers and returned to service.
• On 9 May 1938, de Havilland Express G-AENR of Isle of Man Air Services crashed on landing at Ronaldsway Airport. The aircraft was operating a mail flight from Speke Airport, Liverpool, Merseyside. Despite substantial damage to the port lower wing and both port engines, the aircraft was repaired and returned to service.
• On 14 September 1938, de Havilland Express G-ADVK of Isle of Man Air Services lost the starboard inner propeller in flight whilst operating a flight from Speke to Ronaldsway. The propeller embedded itself in the fuselage of the aircraft. A successful landing was made at Ronaldsway.
• On 22 June 2023, a West Atlantic UK Boeing 737-300, G-JMCL, operating a cargo flight from Isle of Man Airport to East Midlands Airport suffered from a hydraulic failure resulting in the loss of nosewheel steering and degraded braking. The aircraft returned to Ronaldsway and made a successful landing. On landing, significant quantities of hydraulic fluid were spilt, disabling the aircraft on the runway and forcing the overnight closure of the airport and the cancellation of some flights the next morning.

• Poole, Stephen (1999). Rough Landing or Fatal Flight. Douglas: Amulree Publications. ISBN 1-901508-03-X.
• Ritchie, Berry (1997). The Good Builder: The John Laing Story. James & James.

Media related to Isle of Man Airport at Wikimedia Commons

• Official website
• Current weather for EGNS at NOAA/NWS
• Accident history for IOM at Aviation Safety Network