The airline's sudden shutdown created tense and odd scenes at airports.
They may also be entitled to compensation from WOW AIR in accordance with European regulation on Air Passenger Rights.
Online flight booking service Hopper said it would fully reimburse all customers who booked a Wow Air flight via its platform.
Stranded passengers set to travel with Icelandic airline Wow, wait in line at Iceland's global airport in Keflavik. In the final months, WOW Air saw nearly constant negative publicity and speculation that the airline would ground and cancel all flights at any moment, which didn't help the airline hold itself up.
The Iceland-based airline stopped flying overnight and urged passengers to look elsewhere for flights.
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WOW, which focused on low-priced travel across the Atlantic, advised stranded travellers to seek flights with other airlines.
In the case of Wow Air, Icelandair is offering a discount fare for stranded passengers, given the circumstances.
Even if you have exceeded the time limit, O'Shea recommends contacting your credit card company and hoping for a sympathetic agent. To help stranded passengers, many airlines have stepped in with rescue fares.
ICETRA writes that passengers who bought their ticket from a European travel agent (within the European Economic Area) as a part of a holiday package are protected by the Package Travel Directive, an E.U. law protecting consumers who purchase package holidays. So you may just be out of luck or you might get a check in a few years.
"These fares will only be available for passengers who have already embarked in their journey a return ticket with WOW air between 28 March and 11 April 2019".
The Icelandic air transport authority is advising people who bought their ticket with a credit company to check whether their ticket can be refunded.
Icelandair may be abandoning two of its North American routes, but it's not about to abandon WOW Air's stranded customers on either side of the Atlantic.
"Those wishing to avail of these rescue fares should contact the following numbers after 18:30 / 6:30pm this evening: 1890 800600 (from Ireland) / 00353 1 886 8822 (from Europe) / 0333 006 6920 (from UK) / 516 622 4222 (from US) and 800 474 7424 (from Canada)". If the airline declares bankruptcy, passengers can make a claim with the administrator or liquidator.
Once you've started the insurance claim process, do not forget to keep all your receipts and documents to hand.
"She said it wouldn't happen and gave us a pizza, saying we're expecting a flight plan in the next 15 minutes", he told the BBC.
"It's a very simple business offering", Mr. Rennert said.
His top tip? Stick to bigger name airlines, if you can.