Travel from September through March, excluding peak holiday travel in late December and early January. Travel to Europe Mondays through Wednesdays, and return from Europe Tuesdays through Fridays. A 7-night minimum stay is required and there is a maximum stay of 1-month to get this fare.
As an example, I found this price available departing Newark EWR on Tuesday, September 17, returning from Madrid MAD on Tuesday, September 24.
This Basic Economy fare includes a carry-on bag plus a small personal item. A checked bag costs $60 each way.
Seats will be assigned at random upon check-in for this price. You may pay a fee to choose a specific seat.
A Main Cabin Economy fare is $433 roundtrip, which includes one free checked bag, advanced seat assignments, and allows ticket changes/upgrades for a fee.
You can also save $30 by booking a $243 roundtrip Basic Economy ticket on certain third-party booking sites such as FareDepot. Booking via obscure third-party sites often means that there is no ability to change/cancel or there are higher than usual change fees. Since Basic Economy doesn't allow changes anyway, this may not be a big deal. Keep in mind that it may be difficult to cancel within 24 hours since you'll be dealing with a third-party that doesn't process refunds daily and it may not be possible to choose seats, even for a fee.
Related: How to Fly United Airlines
See our fare details for booking info.
Need a room in Madrid? Here's what's available for the mentioned dates on Hotelwatchdog.