As of October 5, 2026, United MileagePlus, Delta SkyMiles, and Flying Blue each print their own rule for putting more than one cabin on an award. This how-to lays out each rule in the program's words, where each program says to search and book, and how partner flights fit in.
Use it as a checklist before you ticket a mixed-cabin award.
At a Glance
- United: The MileagePlus Air Awards page prices flight awards as one-way tickets, says to pick the seat class for every part of the trip, and says "Different cabins may be combined to create a single roundtrip award." It also says "You can also book a one-way award if you wish to travel one way."
- Delta: The SkyMiles travel-with-miles page says to book different experiences on the outbound and return flights, for example Delta Comfort out and Delta One home.
- Flying Blue: The Flying Blue reward-ticket news page says fares combine across cabins only within the same brand (Light, Standard, or Flex) on Air France and KLM-operated reward bookings made from September 8, 2026.
- Partner flights: United books certain carriers by phone, Delta books partner awards through Delta, and Flying Blue sells Air France or KLM flights combined with partner flights at the Standard fare only.
- Before you ticket: Confirm the cabin shown for each segment and the total price on the itinerary you are about to ticket.
Award rules and cabin wording change; re-check each program page before you book.
Real-World Examples
- A United roundtrip in economy one way and business the other matches United's line that different cabins may be combined to create a single roundtrip award.
- A Delta trip in Delta Comfort on the way out and Delta One on the way home is the example Delta prints for different experiences on the outbound and return.
- A Flying Blue booking on Air France or KLM can pair Economy Light with Business Light; Economy Light with Business Flex is outside the same-brand rule.
- A Flying Blue itinerary that adds a partner flight to an Air France or KLM flight prices at the Standard fare.
What the United and Delta Pages Say a Mixed-Cabin Award Is
- The United MileagePlus Air Awards page says "All MileagePlus® flight award prices are for one-way tickets to give you flexibility when you travel. Pick the seat class that works best for every part of your trip."
- The same United page says "Different cabins may be combined to create a single roundtrip award." It also says "You can also book a one-way award if you wish to travel one way."
- United adds: "Pricing for award travel is determined by the city pair between which you wish to travel on a single award."
- The Delta travel-with-miles page says "Book different experiences on the outbound and return flights — Relax in Delta Comfort on the way to your destination and fly home in Delta One® to return rested and refreshed."
- Delta also says "In addition to Delta flights, you can redeem your miles on partner flights, booked through Delta."
Related: Delta Companion Certificate blackout dates.
Flying Blue: Combining Cabins Only Within the Same Fare Brand
- The Flying Blue news page says "Combinability is only allowed within the same brand, across cabins. For example, Economy Light fares can combine with Business Light fares but not with Business Flex fares."
- It says "From September 8, 2026, all new reward bookings on Air France and KLM-operated flights will be available in three options: Light, Standard and Flex." Reward tickets on partner carriers remain unchanged.
- For partner itineraries it says "For AF or KL operations combined with partner flights, only the Standard fare will be available. Stand-alone partner flights will remain non-branded."
Related: Alaska Atmos Rewards review.
Where the Pages Say to Search and Book
- United: "Most travel award itineraries may be booked on our website." Pick the seat class for each part of the trip as you search.
- United partner carriers: "Certain travel awards, such as flights operated by certain carriers, may only be booked over the phone with your local United Customer Contact Center." United says an award booking service fee applies to all bookings made over the phone.
- Delta: Select "Book" at delta.com or in the Fly Delta app; check the box next to "Shop with Miles" on delta.com or "Show Price in Miles" on the app; enter your flight preferences and select "Find Flights." Delta's Award calendar shows the lowest price options for the dates you select.
- Delta partner carriers: The travel-with-miles page lists partners to book through delta.com and a set to book through Delta Reservations, including Air Europa, Air Tahiti Nui, and Kenya Airways.
- Flying Blue: Light, Standard and Flex fares are available across all Air France, KLM, and Flying Blue booking channels.
Before You Book: Confirm the Cabin on Each Segment and the Total Price
- Confirm the cabin shown for each segment and the total price on the itinerary you are about to ticket.
- On Flying Blue, confirm every segment carries the same fare brand.
- On United, plan to fly the whole roundtrip: "If you redeem a roundtrip award and only travel one-way, the unused portion of the award will be forfeited."
Award rules and cabin wording change; re-check each program page before you book.
Pitfalls to Watch
- Flying Blue's same-brand rule means one Flex segment needs Flex on the other cabins too; Light pairs only with Light.
- Delta says "Blackout dates may apply on partner airline-operated flights and are defined by individual carriers."
- United phone bookings carry an award booking service fee, so search united.com first.
Related: Amex Membership Rewards transfer partners for Europe awards.
TL;DR – Verdict
As of October 5, 2026, United prices awards one way and says "Different cabins may be combined to create a single roundtrip award." It also says "You can also book a one-way award if you wish to travel one way." Delta says to book different experiences on the outbound and return. Flying Blue combines cabins only within the same fare brand on Air France and KLM-operated rewards, and prices Air France or KLM plus partner itineraries at Standard. Before booking, confirm the cabin on each segment and the total price.
Award rules and cabin wording change; re-check each program page before you book.
FAQ
What does United say about combining cabins?
The MileagePlus Air Awards page says "Different cabins may be combined to create a single roundtrip award." It also says "You can also book a one-way award if you wish to travel one way," and that all MileagePlus flight award prices are for one-way tickets and to pick the seat class that works best for every part of your trip.
What does Delta say about different cabins?
The SkyMiles travel-with-miles page says "Book different experiences on the outbound and return flights," with Delta Comfort on the way out and Delta One on the way home as its example.
What does the Flying Blue rule say?
For new reward bookings on Air France and KLM-operated flights from September 8, 2026, fares combine across cabins only within the same brand. Air France or KLM flights combined with partner flights are sold at the Standard fare.
How do partner flights fit in?
United books certain carriers only by phone, with an award booking service fee. Delta books partner flights through Delta, either on delta.com or through Delta Reservations. Flying Blue sells Air France or KLM plus partner itineraries at the Standard fare.
What should I confirm before booking?
Confirm the cabin shown for each segment and the total price on the itinerary you are about to ticket.