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The deals to Europe have been nonstop these past couple of weeks — and now, you can get flights to Spain for as low as $370.

Multiple airlines are offering bargain flights to Barcelona and Madrid from a range of U.S. cities including New York, Los Angeles, Washington and even Honolulu. The travel dates fall from January to April, with some availability in October as well.

These low fares are only expected to last for a couple of days, so plan your trip to Spain accordingly.

Deal basics

Airlines: Aer Lingus, Air France, American Airlines, British Airways, Delta Air Lines, ITA Airways, KLM, Iberia, Swiss, TAP Air Portugal and United Airlines.
Routes: Boston, Chicago, Los Angeles, Miami, Newark, New York, San Francisco, Seattle, Washington and other cities have discounted routes to Barcelona and Madrid.
How to book: Determine your best dates through Google Flights, then book directly with the airline of your choice.
Travel dates: January through April; there is also some availability in October.
Book by: The next one to two days.

Kudos to Scott’s Cheap Flights for highlighting this deal. At $49 a year, the site’s Premium membership offers discounts of up to 90% and comes with a 14-day trial. The Elite membership also flags premium, business-class and first-class deals.

Sample flights

This deal also has available routes in Alaska and Hawaii. While most of the routes are in major cities, other places like Rochester, New York, and Savannah, Georgia, also have routes to Barcelona.

Here’s a list of flights we’ve rounded up to Barcelona and Madrid:

• Aer Lingus: John F. Kennedy International Airport (JFK) to Josep Tarradellas Barcelona-El Prat Airport (BCN), starting at $370 (includes a layover in Dublin).
• TAP: Newark Liberty International Airport (EWR) to BCN, starting at $397 (includes a layover in Lisbon, Portugal).
• TAP: Boston Logan International Airport (BOS) to Adolfo Suárez Madrid-Barajas Airport (MAD), starting at $417 (includes a layover in Lisbon).
• Iberia: Los Angeles International Airport (LAX) to MAD, starting at $490.
• Iberia: O’Hare International Airport (ORD) to MAD, starting at $523.
• United and Swiss: Daniel K. Inouye International Airport (HNL) to BCN, starting at $722 (includes a layover in Los Angeles).

We recommend using Google Flights to plan the dates for your trip and then booking your flights directly on the airline’s website; airlines are more dependable if your flight faces a cancellation, delay or booking change.

For a Jan. 31 flight from JFK to Barcelona, Aer Lingus’ $370 flight at 5:20 p.m. is the lowest fare advertised on Google Flights. However, keep in mind that the Aer Lingus flight is the only one with a layover in Dublin. American and Delta both offer $519 nonstop flights to Barcelona.

If you plan to return to JFK a week later, Aer Lingus has an 11:30 a.m. flight which also has a layover in Dublin.

Since Google Flights also offers the option to book via third-party sites, there can be price discrepancies between fares on Google Flights and the respective airline’s website. For example, Google Flights shows a round-trip flight from JFK to Barcelona costs $360 because of third-party booking options, but if you were to book on Aer Lingus’ website, the fare would cost $370.

The discounted fares in these offers are only for basic economy. Aer Lingus’ basic economy fare, known as the airline’s Saver option, allows passengers to bring a carry-on and includes a complimentary meal. The fare does not include checked baggage or advance seat selection.

While seat selection is not included in the Saver fare, you can pick a seat for an additional fee. Seats between New York and Dublin cost anywhere from $29.99 to $114.99 and seats between Dublin and Barcelona cost anywhere from $5.99 to $25.99.

Maximize your purchase

For booking your flights, use a card that earns bonus points on airfare purchases, like The Platinum Card® from American Express (5 points per dollar on airfare booked directly with the airline or through American Express Travel, on up to $500,000 on these purchases per calendar year), Citi Prestige® Card (5 points per dollar on airfare), Citi Premier® Card, Chase Sapphire Reserve (3 points per dollar on airfare), American Express® Gold Card (3 points per dollar on airfare when booked directly with the airline or through Amex Travel) or the Chase Sapphire Preferred Card (2 points per dollar on travel). Check out this post for more on maximizing airfare purchases.

The information for the Citi Prestige Card has been collected independently by The Points Guy. The card details on this page have not been reviewed or provided by the card issuer.

Bottom line

From the cuisine to the historic architecture, Madrid and Barcelona are both worth touring. Even though the New York and Boston areas primarily have the cheapest flights available in this deal, the West Coast, Hawaii and Alaska also have some solid fares to Barcelona and Madrid. Some of these fares are discounted by as much as 54%.