These are the links in the email:
http://209.94.39.21/MilesAhead50Off.asp
http://209.94.39.21/MilesAheadTravelCert.asp
http://209.94.39.21/MilesAheadFly1-15.asp
It does seem a bit shady that the URL is to a particular IP rather than a domain, but if you ping their website (flyrfd.com), it resolves to the IP address above.
You can also call to verify that the promotions are legit.