Spirit Airlines: Donate $5 to Haitian relief, get 5,000 free miles, more (updated)

Donate $5 or more to Haitian earthquake relief and Spirit Airlines will give you 5,000 Spirit miles for free. That's the best "matching" promotion tied to Haitian earthquake relief that we've seen yet. You can donate to YeleHaiti, UNICEF, or the Red Cross. The miles are credited in six to eight weeks. Offer ends January 18 or 200,000 redemptions.

5,000 Spirit miles is enough for one roundtrip off-peak award ticket for a member that has an active Free Spirit MasterCard. Otherwise, you'll need at least 10,000 total miles for a free flight.

Update: American Airlines now has a similar, if weaker, promotion. A $50 donation to Haitian earthquake relief bags 250 miles for free. A $100 donation bags 500 miles for free.