I thought I'd mention - for those with enough capital, the Bank of America Travel Rewards card can be the best card out there.
It functions like Barclay's Arrival Plus where if you make a purchase with a merchant whose merchant code fits a travel category, as determined by BoA, you can apply your points to the travel purchase as a statement credit. Their definition of travel is pretty broad - it includes airfare, hotels, rental cars, cruises, taxis, travel agencies, trains, commuter transport, buses, other transportation services, real estate agents and managers??, timeshares, campgrounds, motor home and RV rentals, tourist attractions, art dealers and galleries, amusement parks, aquariums, zoos, boat leases and rentals, and recreation services.
No annual fee
Baseline reward is 1.5 points per dollar spent.
If you reserve travel through their portal, you get 3 points per dollar spent (except the extra 1.5 points per dollar spent on airfare is capped on the first $6000/yr)
When redeemed against travel expenses, the value of a point is 1 cent. If redeemed as strictly cash, the value of a point is 0.6 cents.
If you have at least $20k, $50k, or $100k combined with BoA or Merrill Edge (this part is critical, since it will let you keep that large amount of money invested), then you can get a bonus on your rewards of 25%, 50%, or 75% by enrolling in the Preferred Rewards program (apparently you will need to have an average balance at the thresholds for at least three months before you can enroll). So, your maximum baseline reward now becomes 2.625 points per dollar spent. And if you book through their travel portal, you get 5.25 points per dollar spent. And as long as you always redeem against travel expenses, you've now used your Mustachian habits of saving money to create a 2.625% cash back on everything card (so long as you use points against their broad definition of travel), and 5.25% cash back on travel booked through BoA's portal.
Unlike the Arrival+, where you can only redeem for travel charges that are at least $25, and you only have 120 days to use points against a travel charge, the BoA card gives you one year, and you can redeem for any charge whatsoever so long as you redeem at least $25 at a time.
Incidentally, these 25%, 50%, and 75% bonuses can also apply to the BoA 3-2-1 cash rewards card (gas, groceries, everything else) to get up to 5.25% on gas, 3.5% on groceries, and 1.75% everything else.