Resources: U.S. Flag Air Carriers and Open Skies Exceptions for International Destinations

See Policy Notes: Fly America Act and Open Skies Exceptions (Federal Project Air Carrier Requirements) for the appropriate use of air carriers when traveling for Stanford business on federal sponsored projects.

On this page:

U.S. Flag Carriers

The list of U.S. flag air carriers changes frequently. Travelers should check the airline’s web site to confirm that the airline is incorporated in the U.S. Following is a list of major U.S. carriers and their International Air Transport Association (IATA) airline codes.

U.S. Airlines 2-Letter IATA Code
Alaska Airlines AS
Allegiant Air G4
American Airlines AA
Delta Air Lines DL
Frontier Airlines F9
Hawaiian Airlines HA
JetBlue Airways B6
Southwest Airlines WN
Spirit Airlines NK
Sun Country Airlines SY
United Airlines UA

Note:  Air Canada is NOT a U.S. flag air carrier.

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Open Skies Exceptions for International Destinations

When specific conditions in the Open Skies Exceptions by Country section of the Policy Notes: Fly America Act and Open Skies Exceptions (Federal Project Air Carrier Requirements) page are met, travellers can travel on any of the following airlines based on their travel destination.

European Union (EU) Countries, Norway and Iceland

Country Airline 2-Letter IATA Code
U.S. U.S. Flag Airlines ––
Austria Austrian Airlines OS
Belgium Brussels Airlines SN
Belgium TUI fly TB
Bulgaria Bulgaria Air FB
Croatia Croatia Airlines OU
Czech Republic Czech Airlines (ČSA) OK
Denmark Scandinavian Airlines (SAS) SK
Finland Finnair AY
France Air France AF
France XL Airways SE
Germany Lufthansa LH
Germany Condor DE
Germany Eurowings EW
Greece Aegean Airlines A3
Hungary Wizz Air W6
Iceland Icelandair FI
Ireland Aer Lingus EI
Ireland Ryanair FR
Italy Alitalia AZ
Latvia Air Baltic BT
Luxembourg Luxair LG
Malta Air Malta KM
Netherlands KLM KL
Netherlands Transavia HV
Norway Norwegian (Air Shuttle) DY
Poland LOT Polish Airlines LO
Portugal TAP Portugal TP
Portugal Azores Airlines – SATA SP
Romania TAROM RO
Romania Blue Air 0B
Slovenia Adria Airways JP
Spain Iberia IB
Spain Air Europa UX
Spain Vueling VY
Sweden Scandinavian Airlines (SAS) SK
Switzerland Swiss (International Air Lines) LX
United Kingdom British Airways BA
United Kingdom Virgin Atlantic VS
United Kingdom EasyJet U2

Note: Cyprus, Estonia, Lithuania and Slovakia are Open Skies countries, but do not have international carriers.

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Australia

Airline 2-Letter IATA Code
U.S. Flag Airlines ––
Qantas Airways QF
Virgin Australia VA
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Japan

Airline 2-Letter IATA Code
U.S. Flag Airlines ––
Japan Airlines JL
All Nippon Airways NH
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Switzerland

Airline 2-Letter IATA Code
U.S. Flag Airlines ––
Swiss International LX
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