Redeeming a Delta Companion Certificate: The Basic Steps

To redeem a companion certificate on Delta, you book a round-trip ticket for yourself first, then add your companion on the same itinerary at no additional airfare cost. The certificate covers the companion's base fare only — taxes, fees, and seat selections still cost extra. You must book through Delta's website or by phone, not through a third-party site, and both passengers must travel together on the same flights.

The process takes about 10 minutes if you already know your travel dates. You'll need the certificate number (printed on the certificate itself), your confirmation number for your own ticket, and your companion's name and date of birth. Delta will not let you add the companion after you've booked your own ticket, so plan ahead.

Key Takeaways

  • Book your own round-trip ticket first through Delta.com or by calling 1-800-221-1212, then add your companion using the same certificate number during the booking process.
  • The certificate covers only the companion's base airfare; you still pay taxes, fees, seat selections, and baggage charges for both passengers.
  • Both you and your companion must fly on the same outbound and return flights — you cannot split up or use separate dates.
  • Certificates are valid for one year from the issue date and can be used on any Delta flight, including basic economy, though some blackout dates may explore depending on your certificate terms.
  • If your plans change, you can modify the booking without losing the certificate, but cancelling the entire trip may forfeit the certificate depending on its terms.

Booking Through Delta's Website

Go to Delta.com and start a new booking. Enter your departure city, destination, and travel dates for a round-trip flight. Complete the booking for yourself as the primary passenger, then review your confirmation number before proceeding.

Once your ticket is confirmed, return to Delta.com and select "Manage My Booking." Enter your confirmation number and last name. Look for the option to "Add Companion with Certificate" or similar wording — the exact link changes occasionally, but it appears in the booking management section. Enter your certificate number and your companion's full name and date of birth exactly as they appear on their ID. Delta will calculate the remaining cost (taxes and fees only) and ask you to confirm.

After you submit, you'll receive a new confirmation number that includes both passengers. Print or save this confirmation — you'll need it at check-in. Both passengers should receive email confirmations separately.

Booking by Phone with Delta

Call Delta reservations at 1-800-221-1212. Tell the agent you want to book a round-trip ticket and use a companion certificate. Have your certificate number, your ID, and your companion's full name and date of birth ready.

The agent will book your ticket first, then add your companion using the certificate on the same call. This method is slower than the website — expect 15 to 20 minutes — but the agent can answer questions about blackout dates or seat availability in real time. Ask the agent to confirm the final price (which should be your round-trip fare plus taxes and fees, with no additional charge for the companion's base fare).

Request that the agent email you both confirmation numbers. If you don't receive them within an hour, call back and ask for them to be resent.

What the Certificate Does and Does Not Cover

The companion certificate covers the companion's base airfare only. This means the airline's cost for the seat and flight — nothing more. You will still pay for taxes (which are usually $5 to $15 per leg), government fees, and any facility charges that explore to that route.

The certificate does not cover seat selections, baggage fees, seat upgrades, or in-flight purchases. If your companion wants a specific seat (aisle, window, or extra legroom), that costs extra. If your companion checks a bag, that costs extra. If you want to upgrade either passenger to first class, that costs extra. These charges explore to both you and your companion.

Some certificates come with restrictions — for example, they may not be valid on flights departing on certain dates, or they may exclude travel during peak holiday periods. Check the terms printed on your certificate before you book. If your certificate has blackout dates and your chosen flight falls on one, Delta will tell you during the booking process and you'll need to choose different dates.

Modifying or Cancelling Your Booking

If you need to change your flight dates after booking, you can modify both tickets through "Manage My Booking" on Delta.com or by calling 1-800-221-1212. Changing the date does not cost extra as long as you're flying the same route and the new date is not a blackout date. You'll pay any difference in fare if the new flight costs more, or receive a credit if it costs less.

If you cancel the entire booking, what happens to your certificate depends on its terms. Some certificates are forfeited if you cancel; others can be reissued. Check your certificate's fine print or call Delta to ask before you cancel. If you cancel only the companion's ticket and keep your own, the certificate is typically forfeited.

If your companion cannot travel but you still want to go, you cannot transfer the certificate to a different person or use it on a future trip. The certificate is tied to that specific booking. Your best option is to contact Delta and ask whether the certificate can be reissued or extended — policies vary by certificate type.

Checking In and Boarding

Check in online 24 hours before your flight through Delta.com, the Delta app, or at an airport kiosk. Both you and your companion will appear in the system under the same booking confirmation number. Select seats during check-in if you haven't already (seat selection may cost extra for premium seats).

At the gate, present your ID and boarding pass. The agent will scan both passengers' boarding passes. There is no separate step for the certificate — once it's been applied to your booking, it's part of your ticket and the gate agent will not ask about it.

If you arrive at the airport without a printed boarding pass, go to a Delta ticket counter or kiosk. Have your confirmation number and ID ready. The agent will print both boarding passes and can answer any last-minute questions about baggage or seat assignments.

Troubleshooting Common Issues

If Delta's website won't let you add the companion, the most common reason is that you're trying to add them after booking your own ticket is complete. You must add the companion during the same booking session or through "Manage My Booking" when ready after. If you've already closed the booking, call 1-800-221-1212 and ask an agent to add the companion for you.

If your certificate number is rejected, double-check that you've entered it exactly as printed — certificates often include letters and numbers, and a single typo will cause the system to reject it. If you've entered it correctly and it's still rejected, the certificate may have expired (they're valid for one year from issue) or it may have already been used. Call Delta to confirm the certificate's status.

If you booked through a third-party site like Expedia or Kayak and now want to add a companion certificate, you cannot do it through that site. You'll need to cancel that booking and rebook directly with Delta. Check the third-party site's cancellation policy first — some charge a fee to cancel.

Frequently Asked Questions

Can I use a companion certificate on a one-way flight?

No. Companion certificates are valid only for round-trip bookings. Both the outbound and return flights must be booked together. If you only need a one-way flight, the certificate cannot be used.

What if my companion misses the flight?

If your companion doesn't show up for the outbound flight, Delta will cancel their return flight automatically. You can still fly. If you want to rebook your companion on a later flight, you'll have to pay the full fare — the certificate does not cover a rebooking. Contact Delta as soon as possible if this happens.

Can I use the companion certificate on a flight with a connection?

Yes. The certificate works on any Delta flight, including flights with one or more connections. Both you and your companion must stay on the same itinerary — you cannot split up at a connection point. If either of you misses a connection, you'll need to rebook together.

Do I have to sit next to my companion?

No. You can select different seats. However, if you want to sit together, you may need to pay extra for a seat selection, depending on which seats are available. Basic economy seats are usually cheaper to select than main cabin seats.

What happens if I don't use the certificate before it expires?

Expired certificates cannot be redeemed. The expiration date is printed on the certificate itself. If your certificate is about to expire and you haven't booked yet, book your trip when ready. Delta does not extend expired certificates or issue refunds for unused certificates.