The Trail 40 is a bag from REI with a volume of 40 liters. The total dimensions, including handles, etc. comes down to 21.625x13.125x10.5" making it suitable as carry-on baggage for 58% of all airlines listed below.
Below is a list of all airlines, with each color stating whether the Trail 40 is allowed as cabin baggage. Green means it is allowed with all tickets, yellow for some tickets, and red for none. In case you are more interested in seeing all available bags for an airline, click the button.
Air Algérie Air New Zealand Air Macau Air Italy Air Seychelles Air Serbia Air Nostrum Air Malta Boliviana de Aviacion Blue Air Belavia Bangkok Airways Azerbaijan Airlines Azul flybe Fiji Airways Eurowings Etihad Airways Ethiopian Airlines Enter Air Easyjet Garuda Indonesia Iberia Iran Air Indigo Kenya Airways Juneyao Airlines Jetstar Asia Jetstar Airways Jet2 Norwegian Onur Air Pakistan International Scoot Ukraine International Turkmenistan Airlines Turkish Airlines TUI airways Transavia Airlines Tiger Airways Tianjin Airlines TAROM LOT Polish Alitalia Air Baltic Air Astana Air Asia Aerolineas Argentinas Aeroflot Aegean Airlines Austrian Atlas Global Asiana Airlines All Nippon Airways (NH) Aircalin AirAsiaX Volotea Czech Airlines Croatia Air Conviasa Kulula Middle East Airlines Mango Malaysia Airlines Mahan Air Luxair Lufthansa Lion Air Group Peach uTair Airlines Swiss International Air Lines Sun Express Sun Country SriLankan Airlines Spring Airlines South African Airways VivaColombia Virgin Australia Uzbekistan Air Wizz Air Vueling Volaris Hainan Airlines Gulf Air Xiamen Air France Air India Air Tahiti Air Niugini British Airways Biman Bangladesh Bahamasair Avianca Delta Finnair EVA Air Emirates Frontier Airlines Horizon Airlines Hong Kong Airlines Hawaiian Airlines Icelandair jetBlue Airways Japan Airlines KLM United Airlines Shenzhen Airlines Kuwait Air Sky Airlines SAS Scandinavian S7 Ryanair Royal Jordanian Royal Brunei Airlines Republic Airways Regional Express Ravn Alaska Qatar Airways Trans States Thai Airways TAP Portugal American Airlines Alaska Air Aeromexico Cathay Pacific Aer Lingus Air China Air Canada (AC) China Airlines Cebu Pacific Cayman Airways Cambodia Angkor Air ANA American Eagle Allegiant Air Air Transat China Southern Airlines China Eastern Dragonair Oman Air LATAM Qantas Airways Porter Airlines PenAir TAAG Angola Spirit Airlines Southwest Airlines Virgin Atlantic WestJet