Putting every purchase on a single rewards card is easy, but it leaves points on the table. A recent deep dive from The Points Guy argues the real earning power comes from pairing cards with complementary bonus categories — ideally sharing the same rewards currency so points can be pooled and transferred.

The classic example is the American Express pair: the Amex Platinum ($895 annual fee) earns 5 Membership Rewards points per dollar on flights booked directly with airlines or through Amex Travel, up to $500,000 a year. The Amex Gold ($325 annual fee) handles the food bill, with 4 points per dollar at restaurants worldwide (first $50,000 annually) and at U.S. supermarkets (first $25,000), plus up to $120 in annual dining and takeout credits. Because the two cards' credits barely overlap, holding both can pull in real value, and the combined Membership Rewards points transfer to 20 airline and hotel partners.

For cheaper setups, Chase offers a well-known budget pairing. The Chase Sapphire Preferred ($95 annual fee) earns 5 Ultimate Rewards points per dollar on Chase Travel bookings and 3 points on dining, gas, EV charging, select streaming, online groceries and vacation rentals booked through brands like Airbnb and Vrbo. Add the no-annual-fee Freedom Unlimited — 3% back on dining and drugstores, 1.5% on everything else — and its cash-back earnings can be converted into transferable Ultimate Rewards points if you hold the Preferred, unlocking Chase's 14 travel partners.

Frequent flyers can double up on Chase travel cards: the Sapphire Reserve earns 8 points per dollar on Chase Travel and 4 on direct flight and hotel bookings, while the Preferred covers vacation homes and other travel at 3 and 2 points respectively. Combined with perks like lounge access and primary rental car insurance, that setup guarantees at least 2 points per dollar on travel, with redemptions through Chase's Points Boost worth up to 2.5 cents apiece. Mixing business with pleasure also works: the Ink Business Preferred (3 points on travel, shipping, internet, phone and social media ad spend, up to $150,000 a year) pairs neatly with the Sapphire Reserve, pooling into one Ultimate Rewards account.

Capital One has its own budget duo. The no-fee Savor card earns 3% back on dining, entertainment, groceries and streaming (5% on Capital One Travel bookings), while the $95 Venture Rewards card earns a flat 2 miles per dollar everywhere else — so no purchase earns at a weak rate.

Why should a holidaymaker care? Because the right two-card combo can effectively fund flights and hotels faster, and many of these cards carry no foreign transaction fees. The catch: these are U.S.-issued cards with U.S. credit requirements, steep annual fees on the premium options, and spending caps on the best bonus rates. Match your cards to how you actually spend — flights, restaurants, groceries or business expenses — rather than chasing the flashiest combo.

Credit: The Points Guy