For many travelers, booking a round-trip flight seems like the default option. However, under certain conditions, purchasing two separate one-way tickets can result in significant savings. This is particularly true when using reward points or mixing airlines, and even when comparing against standard fares.

Points and Flexibility: The One-Way Advantage

Airline reward programs often price one-way flights more dynamically than round-trips. While a round-trip redemption might seem fixed, booking two one-ways can allow you to take advantage of variable pricing. Some carriers, like United, exclusively price award flights as one-ways, meaning you’re already looking at segmented fares by default.

The benefit extends beyond cost. One-way tickets provide greater flexibility. Airlines like JetBlue recommend booking one-ways with points because changes and cancellations are easier to manage. If plans shift, updating a single one-way leg is simpler than modifying an entire round-trip itinerary.

Moreover, if you hold points across multiple airlines, one-ways let you combine programs. Instead of being limited to a single carrier’s availability, you can book one leg with Airline A and the other with Airline B, maximizing point utilization. This strategy is especially useful when routes lack sufficient reward availability on one airline.

Multi-Airline Savings: A Hidden Opportunity

Beyond points, sometimes the best deals emerge from combining different airlines. If United offers a cheap flight to your destination and American has a great deal from it, booking separate one-ways can beat a single round-trip fare. Airlines sometimes move aircraft and discount empty seats, creating one-way bargains for savvy shoppers.

Tools like Google Flights make this comparison easy. Search for one-way options, use filters, and explore calendar views to spot the lowest prices.

Example: A round-trip San Francisco to Miami flight on April 18-20 costs $249 (without baggage). But searching one-way reveals a $77 flight on April 18 and a $101 return, totaling just $178.

Flight Deals and Round-Trip Value

Not all savings lie with one-ways. Flight deals are often structured as round-trip fares, meaning splitting them into one-ways can negate the discount.

Example: A recent deal for Puerto Vallarta offered a round-trip for $264. But booking separate one-ways during the same period cost $305, making the deal the better choice.

The Trade-Off: Time vs. Money

Ultimately, finding the cheapest option requires effort. Comparing one-way and round-trip fares, checking multiple airlines, and navigating reward programs takes time. However, for travelers willing to invest that time, the potential savings can be substantial – and the added flexibility can make all the difference.