What Is an Open-Jaw Flight? How to Book Multi-City Award Trips Without Backtracking or Paying One-Way Surcharges

YellowSquared · Published November 11, 2026 · Updated November 11, 2026

Suppose you are planning a two-week trip to Europe: you want to land in London, spend four days exploring Britain, ride the Eurostar or take a short hop to Italy, and fly home to New York directly from Rome. If you price that trip as two separate one-way cash tickets on a full-service transatlantic airline, the total often jumps past $2,100+. If you buy a standard closed round-trip to London (JFK→LHR→JFK), you waste your final vacation day—and pay extra airport taxes—flying back from Rome to Heathrow just to catch your return flight. The third option solves both problems at once: booking a single open-jaw ticket using the airline’s Multi-City search tab.

When you compare cash vs. points redemptions in Pointsuno, mastering the three types of open-jaw itineraries—and knowing when to use a multi-city cash ticket versus two one-way award redemptions—can save hundreds of dollars in carrier surcharges and airport departure taxes.

The 3 Types of Open-Jaw Tickets (and Why Draw-on-a-Map Geometry Gives Them Their Name)

When you plot a standard round-trip (JFK -> LHR -> JFK) on a map, the outbound and return flight paths form a closed loop. When one end of the trip is left unflown—creating an overland “surface sector” that you cover by high-speed train, rental car, cruise ship, or low-cost carrier—the two flight lines form an open angle like an open mouth or jaw (Open-jaw ticket):

1. Destination Open-Jaw (Most Common for Vacationers): You depart from your home airport to City A, travel overland to City B, and fly back to your original home airport (JFK -> LHR // surface // FCO -> JFK).
2. Origin Open-Jaw (Ideal for Repositioning or East Coast Hubs): You depart from Airport A to a destination, and return from that same destination to a different home-region Airport B (BOS -> CDG // CDG -> JFK).
3. Double Open-Jaw (Both Ends Open): Both your origin pair and your destination pair differ on a single ticket (EWR -> MAD // surface // BCN -> BOS).

Chart comparing total transatlantic ticket cost in USD and time saved across two separate one-ways, invalid open-jaw, closed round-trip with backtrack, double open-jaw, destination open-jaw, and origin open-jaw — Figure 1: Total transatlantic economy ticket cost ($ USD) and hours saved across six multi-city routing structures. Download the full fare-construction comparison table in open-jaw-itinerary-types-cash-surcharge-and-award-rules.csv.

Cash Fare Construction vs. Award Miles: How the IATA Half-Round-Trip Rule Works

Why does a multi-city open-jaw cash ticket (JFK -> LHR + FCO -> JFK) cost $960 when buying those exact same two flights as separate one-way cash tickets costs $2,180? Under IATA tariff combinability rules (and joint-venture codeshare / interline agreements such as the Atlantic Joint Venture between Delta, Air France-KLM, and Virgin Atlantic, or Oneworld’s American/British Airways/Iberia joint business), a valid open-jaw prices as 50% of the round-trip fare to City A plus 50% of the round-trip fare from City B:

Booking Structure	Sample Transatlantic Route	Flown Miles	Surface Gap	Typical Cash Fare	Award Miles + Tax	Time & Tax Outcome
2 Separate One-Way Cash Tickets	`JFK→LHR` + `FCO→JFK`	`7,736 mi`	`898 mi`	$2,180	`140k mi (Dynamic)`	Saves 6.5h, but huge cash fare penalty
Invalid Open-Jaw (Gap > Flown)	`JFK→DUB` // `IST→JFK`	`8,200 mi`	`1,835 mi`	$1,950	`Priced as 2 awards`	Violates IATA surface-sector distance rule
Closed RT + Backtrack Flight	`JFK→LHR→JFK` + `FCO→LHR`	`7,810 mi`	`0 mi`	$1,140	`60k mi + $310 tax`	Wastes 1 day + pays high UK exit APD
Double Open-Jaw (Multi-City)	`EWR→MAD` // `BCN→BOS`	`7,415 mi`	`313 mi`	$985	`60k mi + $88 tax`	Saves 5.5h (AVE high-speed rail gap)
Destination Open-Jaw	`JFK→LHR` // `FCO→JFK`	`7,736 mi`	`898 mi`	$960	`60k mi + $115 tax`	Saves 6.5h + saves $195 UK exit APD
Origin Open-Jaw	`BOS→CDG` // `CDG→JFK`	`7,082 mi`	`187 mi`	$940	`55k mi + $152 tax`	Saves 4.0h (No positioning backtrack)

“Because the United Kingdom’s Air Passenger Duty (APD—£88 in economy and £194 to £202+ in premium cabins) is levied exclusively on departures from UK airports, flying into London Heathrow and departing home from Paris, Brussels, Dublin, or Rome on an open-jaw ticket eliminates long-haul UK APD completely.”

Three Rules to Check Before Booking an Open-Jaw Cash or Award Ticket

The IATA Surface-Sector Distance Rule (Surface Gap < Shortest Flown Leg): For a cash multi-city ticket (or a legacy round-trip award chart) to qualify as an open-jaw, the great-circle distance of the unflown surface gap (LHR to FCO = 898 miles) must be shorter than the shortest flown international leg (JFK to LHR = 3,451 miles), and both open cities typically must sit within the same IATA tariff region (e.g., Europe).
When to Use Multi-City vs. Two One-Way Award Tickets: If you are paying cash (or redeeming bank portal points at 1.25–1.5 cents/pt as cash), always book a single Multi-City open-jaw ticket so half-round-trip combinability applies. If you are transferring points to airline frequent-flyer programs (like Air Canada Aeroplan, Air France-KLM Flying Blue, British Airways, or United MileagePlus), check whether two separate one-way awards price identically to a round-trip—if they do, booking two separate one-ways gives you the freedom to cancel or change the return leg without repricing the outbound leg.
Never Skip the Final Leg of a Closed Round-Trip: Travelers sometimes wonder if they can book a cheaper closed round-trip and simply not show up for the outbound leg, or abandon a return connecting leg. Skipping any outbound or intermediate segment triggers automatic cancellation of all remaining segments in the Passenger Name Record (PNR). Always book a legitimate Multi-City open-jaw instead.

Comparing credit-card transfer partners, carrier surcharges, and cents-per-point values for your next multi-city trip? Open Pointsuno to calculate award redemptions vs. cash fares side by side, or browse our award travel strategy guides.