WOW Air has been struggling lately with many routes being cut in recent weeks. In addition to those routes being cut, I noticed today that Chicago flights seem to be suspended for the winter season between late January and March. It appears that WOW Air is trying to give some good news in the midst of all this trouble by having another 50% off holiday promo code sale. Flights to Europe are as low as $151 roundtrip.

Enter promo code WOWXMAS when booking on wowair.com to apply the discount to the base fare of a roundtrip purchase for travel from January 7 through June 10, 2019.

Since WOW Air has cut many routes, this promo code discount will only apply to flights departing from Baltimore (BWI), Boston (BOS), Detroit (DTW), Newark (EWR), Montreal (YUL), and Toronto (YYZ). Promo code fares are not eligible for the free stopover program, but you may be able to find some routes on certain dates that have long layovers in Iceland if you wish to stop on your way to or from Europe.

Even with WOW Air's many fees, some of these routes don't see that many flash sales on other airlines and WOW Air can still often be the best price after you add in any extra fees that are necessary. WOW requires that you sign up for the free MyWOW membership to purchase fares using a promo code. All you need to do is give your email address and agree to receive a newsletter.

All bookings must be made by 6:59 pm ET, December 23, 2018.

A sample of fares include:

Boston to Reykjavik $151 roundtrip, nonstop

Baltimore to Reykjavik $151 roundtrip, nonstop

Newark to Reykjavik $161 roundtrip, nonstop

Detroit to Reykjavik $166 roundtrip, nonstop

Montreal to Reykjavik $196 CAD roundtrip, nonstop ($182 USD)

Toronto to Reykjavik $196 CAD roundtrip, nonstop ($182 USD)

Montreal to Dublin $261 CAD roundtrip ($196 USD)

Montreal to Brussels $272 CAD roundtrip ($204 USD)

Boston to Dublin $205 roundtrip

Newark to Dublin $205 roundtrip

Montreal to Paris $279 CAD roundtrip ($209 USD)

Boston to Amsterdam $211 roundtrip

Newark to Brussels $213 roundtrip

Boston to Paris $218 roundtrip

Newark to Paris $218 roundtrip

Baltimore to Dublin $220 roundtrip

Toronto to Paris $293 CAD roundtrip ($222 USD)

Baltimore to Copenhagen $228 roundtrip

Boston to Berlin $230 roundtrip

Detroit to Dublin $235 roundtrip

Toronto to Berlin $325 CAD roundtrip ($247 USD)

Montreal to Frankfurt $328 CAD roundtrip ($248 USD)

Detroit to Amsterdam $256 roundtrip

Newark to Berlin $260 roundtrip

Detroit to Paris $263 roundtrip

Detroit to Milan $263 roundtrip

Newark to Stockholm $266 roundtrip

Newark to London $270 roundtrip

Baltimore to Frankfurt $272 roundtrip

Newark to Frankfurt $287 roundtrip

Boston to Lyon $322 roundtrip

Baltimore to Milan $328 roundtrip

Detroit to New Delhi $562 roundtrip

There are many more routes available as well. You'll need to decline all extras to get the lowest price. WOW basic fares only include one small personal item (small backpack, purse, etc.). Carry-on bag fees start around $45-$55 each way. Checked bag fees start around $55-$70 each way.

One interesting thing I noticed is that if you click through and book via this secret flexible calendar link, you'll be able to get a lower $35 each way carry-on bag fee on all routes. This can potentially save up to $30 roundtrip in bag fees, so give it a go. Plus, it will be easier to find the lowest available prices using this link. You'll just have to click the "search again" button to adjust the search for your desired route.

If you want to avoid all extra fees, learn How to Pack in Just a Personal Item Sized Bag.

As an example booking, using promo code WOWXMAS on wowair.com, I found seats departing Boston BOS on Friday, January 25, returning from Berlin SXF on Thursday, January 31, for $230 roundtrip.

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