Yes, most airlines let you buy a second adjacent seat (“extra seat”) for comfort or to secure an item, if fare and safety rules are met.
Booking Two Seats On A Plane — When And How
Airlines sell a second seat to the same traveler under names like “extra seat,” “comfort seat,” or “cabin seat baggage.” You pay the fare twice and the two seats sit side by side. That guarantees space and keeps strangers out of the middle. It also lets you strap fragile items, such as a cello, into a seat instead of checking them.
You’ll see small differences by carrier. Some let you add the seat online; others want a call so an agent can lock the seats together in one record. Basic economy often blocks this since those fares don’t include advance seat selection.
Quick Airline Snapshot
If you fly a carrier with open seating or special seating rules, check its extra seat page before paying. For instance, Southwest spells out its “extra seat” and “customer of size” steps and post-flight refund request window on its support page.
| Airline | Can You Book A Second Seat? | Notes / Refund |
|---|---|---|
| American Airlines | Yes, by contacting Reservations | Extra seat required if one seat won’t work; refunds not typical |
| United Airlines | Yes; extra seat priced like your original | Seat must stay empty and beside you |
| Delta Air Lines | Yes; book as an “EXST” extra seat | Basic Economy not eligible; no extra carry-on for the extra seat |
| Southwest | Yes for customers of size | Traditionally refunded after travel on request; rules are changing in 2026 |
| Alaska Airlines | Yes; “comfort seat” available | Refund possible when a flight departed with open seats |
| JetBlue | Yes; can select an extra adjacent seat | Both seats must be in the same fare option |
For musical instruments, U.S. rules let you buy a seat for a larger piece when weight and securing needs are met; see the federal 14 CFR Part 251 text for the exact limits.
Who Should Consider A Second Seat
More Personal Space
If tight quarters leave you sore or anxious, buying two seats removes the squeeze and keeps the armrest down. That shoulder room turns a long grind into a calmer ride.
Customers Of Size
If one seat doesn’t work with armrests down or a seatbelt extender alone won’t do, many carriers ask you to purchase an extra seat in advance. This guarantees space and avoids last-minute rebooking if the flight fills up.
Medical Devices And Mobility Needs
Bulky braces or post-op gear can make one seat tough. A second seat prevents contact with neighbors and gives you room to move.
Fragile Or High-Value Items
Fine instruments, framed art, and precision gear travel safer in a seat than in a cargo hold. When secured correctly, they stay within sight and buckled in.
How To Book An Extra Seat The Right Way
Step-By-Step Booking Flow
- Search fares as usual for your route and date.
- Pick a fare that lets you choose seats in advance at booking. Skip basic economy if seat selection is blocked.
- Add one more seat for yourself. Some sites show a special “extra seat” option; others ask you to book for two adults and label the second seat.
- Seat the pair together in the same row. If the tool won’t allow this, call the airline to link and lock the pair.
- At check-in, verify both seats remain beside each other. If anything moved, ask an agent to fix it before boarding.
Name Format Airlines Expect
Airline systems tag the second seat so agents and crews know it belongs to you. Many carriers use the code “EXST” tied to your last name in the record. Others label it “comfort seat.” Either way, both seats must ride under one booking so the pair can’t be split.
Seat Selection And Boarding
Choose two adjacent seats you can actually sit in, such as a window and middle or a middle and aisle. The extra seat must remain empty for the whole flight. If gate changes reshuffle assignments, speak up early. On open-seating airlines, a gate agent can place a “reserved” slip on your adjacent seat.
Costs, Refunds, And Miles
What You’ll Pay
Expect to pay the same fare twice in the same cabin. Taxes and fees apply to both seats. The extra seat doesn’t add a second carry-on allowance, though your checked bag rules follow the fare you purchased.
Refund Possibilities
Some carriers process a refund for eligible “customer of size” bookings when flights depart with empty seats. Others treat the second seat like any nonrefundable ticket. Read the fare rules before you pay, save your receipts, and request any refund after travel if your airline allows it.
Points And Elite Credit
Programs vary. A few will post redeemable miles for the paid extra seat, while elite status credit usually doesn’t post on that second ticket. If miles matter, ask your program how it handles extra seats and keep boarding passes until the credit lands.
Bringing Large Items? “Seat Baggage” Rules
When your item can’t fit in an overhead bin, you can buy a seat for it under “seat baggage” rules. The case must be covered, under 165 pounds, buckled in next to you, and not block signs or exits. Cellos are the classic example, but the same idea applies to many awkward or fragile pieces. U.S. regulations spell out these limits.
Seat-Baggage Checklist
| Item Or Rule | Limit Or Placement | Key Requirement |
|---|---|---|
| Weight | Up to 165 lb including case | Must meet aircraft limits |
| Placement | Seat next to you | Secured with the seatbelt |
| Protection | Hard case or padded cover | No sharp edges exposed |
| Seat Type | Standard forward-facing | Can’t block aisle or signage |
| Carry-on Space | No overhead bin needed | Item stays strapped the whole flight |
Airlines may ask you to board a little early to fasten the straps and confirm the fit. Bulkhead seats aren’t required, though a regular row with an open view of signs works best.
International And Codeshare Flights
Flying abroad or on a partner metal adds a few twists. Seat sizes, naming rules, and refund paths can differ across brands on the same ticket. Book the extra seat on the operating carrier’s record, not just the marketing carrier’s site, and confirm the pair remains side by side on each leg. If a regional partner runs a smaller jet, ask about seat widths and whether belt extenders are stocked on that fleet.
Some non-U.S. carriers will take the payment online but still want an agent to annotate the file so local stations honor the setup. A short call saves drama at the gate. If a partner uses paid seat assignments, buy both seats in the same fare family so the boarding group and baggage rules match.
Seat Map Smarts
Not all layouts give you the same comfort. On many regional jets with a 2-2 layout, a window plus aisle on the same side forms a private nook. On certain wide-bodies with a 2-3-2 layout, a window plus middle can feel roomy thanks to the wider cabin. On single-aisle planes, a window plus middle usually feels calmer than a middle plus aisle because fewer travelers brush past you.
Peek at the seat map. If you see exit rows with fixed armrests, skip that pair. Those armrests often house tray tables, which limit hip room. If you need a movable armrest between your two seats, choose a standard row and keep that divider down to signal “occupied.”
Practical Tips To Keep The Seat Empty
- Avoid basic economy on carriers that lock seat selection.
- Book both seats in one transaction so the system treats them as a pair.
- Pick aisle plus middle or window plus middle to reduce “seat poachers.”
- Arrive early and ask a gate agent to confirm the empty seat stays yours.
- Carry a printout or digital note that shows the extra seat in your record.
- Snap a quick seat map screenshot after check-in in case auto-reassignments happen.
- Bring a light scarf or strap to keep the armrest down between your seats.
Common Pitfalls To Avoid
Two Separate Bookings Under The Same Name
Don’t buy a second ticket as if it were for another traveler. If a system sees a no-show on that “second person,” a standby passenger could land in that seat. Use the airline’s extra seat process so staff can mark the seat as yours from gate to gate.
Assuming The Extra Seat Adds Carry-On Rights
The second seat doesn’t double your cabin baggage. Your personal item and carry-on limits still follow your fare. Plan checked bags around that and you’ll avoid a fee surprise at the gate.
Skipping A Conversation With The Airline
If the website looks unclear, call. An agent can tag the record, sit the pair together, and document special notes so airport teams know what to do on the day of travel.
The Takeaway On Buying Two Seats
Yes, you can buy two seats on one ticketed itinerary and ride with space, calm, and a plan. Use a fare that lets you pick seats, label the extra seat the way the airline expects, and keep both seats linked from booking to boarding. For instruments or other fragile cargo, paid seat-baggage rules let you strap the item in beside you when it meets the weight and securing requirements.