JetBlue is the only airline that offers free Wi-Fi at every seat and on every plane. The airline partners with Viasat to provide Internet service. All JetBlue-operated flights have coverage over the contiguous U.S. and the airline promises download speeds of up to 20 Mbps.
Southwest Rapid Rewards members who reached the A-List Preferred status can use free inflight Wi-Fi during the whole flight. A-List members, other members of Southwest's Rapid Rewards frequent flyer program, and non-members will have to pay $8 for inflight Wi-Fi all day.
Icelandair made Wi-Fi available to everyone on board of its airplanes. However, Wi-Fi access is not free for everyone. Thus, passengers flying Saga Premium and Saga Premium Flex receive complimentary Wi-Fi access for 2 devices. Icelandair Saga Gold frequent flyer members also get complimentary wireless internet for two devices.
All Aer Lingus' A330 aircrafts have Wi-Fi onboard. And all Aer Lingus flyers can get internet access starting at $7.95. Only Business Class passengers can get Aer Lingus Wi-Fi for free.
Wi-Fi connection on Turkish Airlines flights is available on select international flights only. Business Class passengers and Miles&Smiles card holders can get the benefit of free Wi-Fi quotas. When the complimentary quota is consumed, passengers in Economy Class will have to buy internet packages to continue using the service.
Emirates provides various onboard Wi-Fi plans for all passengers starting at $2.99. However, if you are an Emirates Skywards member, you can take advantage of free Wi-Fi services. Emirates Skywards members traveling in First Class or as a Platinum member in any travel class can enjoy free Wi-Fi internet for the whole flight.
Philippines Airlines offers myPAL Wi-Fi Hi-Speed internet on select international flights. All passengers have access to complimentary chat plan of 3MB. Business Class passengers are provided with a promo code to enjoy additional 100MB of data for free. Additional Wi-Fi plans start at $3.
As you can see, sometimes even being a member of a frequent flyer program doesn't give you access to free in-flight Wi-Fi. Most often, you should be a business class traveler or buy the service onboard.