This deal must be booked by May 28 for departures between June 16 and July 31, so if you are considering a flight to Europe by then this is worth a look. United Airlines and Lufthansa have combined forces for some tempting prices between the United States and Europe.

If you’ve priced these transatlantic tickets already you know prices are insanely high, so if you can get a seat as part of a special like this is can be a big help. Not surprisingly, you have to travel on Monday through Thursday to get the best deals, and the usual restrictions of a Saturday night stay-over and a maximum of 30 days apply.

Here are some sample fares (each-way prices, so double them to really compare)

• Baltimore – Rome $642
• Boston – Frankfurt $498
• Los Angeles – Amsterdam $556
• Los Angeles – Rome $616
• New York City – Athens $560
• San Francisco – Munich $551
• Washington DC – Prague $598

Check out the United Europe Adventure Sale