There are several bonus mile offers for flights to Europe being offered. We’ve rounded up several below.

Northwest Airlines is introducing new nonstop flights from Detroit to Duesseldorf, Germany and Brussels, Belgium and is offering up to 15,000 WorldPerks bonus miles on itineraries that include the new nonstop routes. Service to Duesseldorf begins June 5, 2007, and to Brussels June 15, 2007, and the bonus offer is valid for travel through Oct. 31, 2007. The offer is only open to members residing in the U.S. or Canada who register by July 31 prior to travel. Members will earn 15,000 miles on World Business Class (J, C, Z) fares, 10,000 miles in coach (Y, S, B, M) or 5,000 miles in discount coach fares (H, Q, V, L, T, K).

United has a new nonstop flight from Washington, D.C. (IAD) to Rome as of April 1, 2007, and is offering bonus miles to Mileage Plus members who fly the new route. Through May 31, 2007, United Plus members who fly qualifying United roundtrips between the U.S., Canada, Puerto Rico or U.S. Virgin Islands and Rome can earn 15,000 bonus miles for first class (F, A), 10,000 bonus miles for business class (C, D, Z) or 5,000 bonus miles for coach (Y, B). Registration is required using promotion code MPE007. If your European stay includes a two-night or more executive-level stay at participating Park Plaza Hotels & Resorts throughout Europe, you will earn double miles through April 30, 2007. Enter code MPH 107 at http://www.parkplaza.com/uadouble

Until April 30, 2007, Continental OnePass members can earn 2,000 bonus miles on flights between New York/Newark Liberty and Hamburg, Berlin, Milan or Zurich. Advance registration is required with the following codes: Hamburg, 53088; Milan, 53089; Zurich, 53087 and Berlin, 53086.

Delta SkyMiles members can earn up to 45,000 miles (enough to redeem for a domestic first class ticket) for international travel between New York (JFK) and London (Gatwick). Until May 31, 2007, earn 45,000 bonus miles for BusinessElite (J or D fare classes) or 25,000 bonus miles for full-fare coach or discounted BusinessElite travel (I, Y, B or M fare classes). Plus, members who book JFK to Gatwick flights will earn an additional 2,500 bonus miles when paying with an American Express credit card. You must register for the promotion at http://www.delta.com/londonbonus before booking and complete travel by May 31.

Fly on American Airline’s nonstop roundtrip flight between New York (JFK) and Zurich until April 30, 2007, and earn 2,000 bonus miles. To qualify for the offer, AAdvantage members must register before traveling and use code ZRH2K. Only published fare nonstop roundtrip flights on American Airlines qualify for this offer.

American AAdvantage members who travel roundtrip in first or business class between New York (JFK) and London can earn up to three award trips anywhere American flies in the U.S. (including Alaska and Hawaii), Canada, Mexico or the Caribbean. Travel must be completed by May 31, 2007. Members will earn one award trip per qualifying flight, up to three. Register prior to travel with promo code AAJFK at http://www.aa.com/offers