Low-cost airline Play is helping travelers save on a trip to Europe with a monstrous Halloween sale that has flights starting at less than $100.

The sale, which must be booked by Oct. 31, is valid on flights from the United States to popular destinations, including London, Amsterdam, and Paris, Play shared with Travel + Leisure. 

“Not only does October usher in spooky season and Halloween festivities but it also marks the start of shoulder season, a popular time of year for travelers to visit Europe if they want to avoid higher prices and peak tourism crowds,” Play wrote in a statement shared with T+L. “With scary low airfare to popular European destinations, travelers can help themselves to an extra treat this Halloween by booking their next shoulder season getaway. It’s not a trick, it’s a treat!”

Fly to Iceland starting at just $99, or fly to London, Amsterdam, Berlin, Copenhagen, or Paris starting at just $109. Travelers can book flights from Play’s U.S. gateway airports: Baltimore/Washington International Airport (BWI), Dulles International Airport (IAD), New York’s Stewart International Airport (SWF), or Boston Logan International Airport (BOS).

As part of the sale, travel is valid from both BOS and SWF from Nov. 9 to Dec. 2, from Jan. 11, 2025, through March 9, 2025, and from March 23, 2025, through March 29, 2025. From IAD, the sale is available for travel from March 1, 2025, through March 29, 2025; and from BWI, the sale is available for travel from Jan. 11, 2025, through March 9, 2025, and from March 23, 2025, through March 29, 2025.

Play, a low-cost Icelandic airline, recently announced it would cut back on flights to the U.S. next year following “disappointing” profits, planning to decrease the number of North American destinations it flies to by mid-2025. It is not clear exactly what that will look like, but a spokesperson for the airline told T+L there will be no changes to the carrier’s service until after that mid-2025 date.

The airline, which first started flying in Europe in 2021 before launching its first flight from the U.S. the next year, is known for its inexpensive, bare-bones tickets. It operates a “hub-and-spoke model” in which all flights connect through Reykjavik before heading on to other destinations across Europe and operates an Airbus fleet, including the A321neo and A320neo aircraft.