Cliffs of Moher, Ireland.
The Cliffs of Moher, in Ireland.
| Credit: Getty Images

Norwegian Air is celebrating St. Patrick's Day with a sale, with $89 flights (one-way) to the U.K. and Ireland from Boston and New York.

The sale announced Friday goes through Monday, March 19 at midnight ET. The cheap flights are available for travel in April, May and June, as well as August, September, and October, but the lowest prices are subject to availability. If a cheap getaway to Dublin, Belfast, Cork or Shannon sounds tempting, don't wait to buy.

While Norwegian offers budget fares from all the airports it serves, these *extremely* low fares are from Providence/Boston-TF Green and New York Stewart International. Anyone unfamiliar with those airports (especially those in the New York City metropolitan area) should check the location and research commuting options to ensure they'll still be getting a goood deal.

Return flights start at $155, so round-trip the fares could be as cheap as $244.

Norwegian is a budget airline, meaning seat assignments, in-flight meals, and baggage can cost extra.

If those two airports aren't convenient, don't despair: Flights in the $300s and $400s round-trip have been available recently to a number of European airports on different airlines. Check Google Flights' low-fare calendar from your home airport for options.

And if cheap flights to Europe aren't appealing enough, some of those super cheap flights to Hawaii might still be available.