How to Read a Flight Itinerary
Quick answer
A flight itinerary lists your booking reference (a six-character code), your flights with airport codes and times, a fare class letter that sets the rules of your ticket, your baggage allowance, and connection details. Read it to confirm your name matches your passport, the dates and codes are correct, the layover is long enough, and whether any connection is a self-transfer. Catching a mistake early is far cheaper than fixing it at the gate.
Compare and book with confidence on ScanFlyGo →
Booking reference vs ticket number
Two codes cause the most confusion. The booking reference (also called a PNR or confirmation code) is six letters and numbers, like a locker key that opens your reservation to check in and make changes. The ticket number is a longer numeric string that proves the ticket was issued and paid. If you can check in with the booking reference, the ticket is usually fine; keep both handy if you ever need to call the airline.
Reading the flight lines
Each flight leg typically shows the airline and flight number, the departure and arrival airports as three-letter codes, the dates and local times, and sometimes the terminal and aircraft type. A few things to watch:
- Airport codes — cities with multiple airports differ a lot; confirm you have the right one (times are always local to each airport).
- Overnight arrivals — a small "+1" means you land the next day; useful for long-haul planning.
- Operated by — a note that another airline operates the flight (a codeshare) tells you which check-in desk and baggage rules apply.
What the fare class letters mean
Next to each leg you will often see a single letter — a fare or booking class. Everyone in economy sits in the same seats, but the letter shows which fare bucket you bought, and that quietly controls price, mileage earning, and whether changes or refunds are allowed.
| You might see | What it signals |
|---|---|
| A flexible cabin letter | Fuller-fare economy — more miles, easier changes |
| A discounted letter | Cheaper economy — fewer miles, stricter rules |
| A basic/lowest letter | Most restrictive — often no changes or seat choice |
The exact letters vary by airline, so treat them as a prompt to check the fare rules rather than a universal code.
Spotting layover and self-transfer clues
Connections are where itineraries hide risk. On a single ticket, the airline checks your bag through and rebooks you if a delay makes you miss the connection. On a self-transfer, you collect your bag, clear any customs, and check in again — and a missed connection is your problem. Signs of a self-transfer include two separate booking references, a note that baggage is not checked through, or two unrelated airlines with no through-fare. Only take these when the layover is generous and you understand the risk.
Baggage and passenger details
Your itinerary shows the cabin and checked baggage allowance, sometimes as codes like a piece count or weight. Confirm it matches what you are actually carrying, since low fares often exclude checked or even cabin bags. Then check the passenger section: your name must match your passport exactly, including middle names where required, and your date of birth and any traveller numbers should be correct.
A quick pre-flight checklist
- Name matches passport exactly.
- Dates, times and airport codes are correct.
- Every connection has enough time, and you know if it is a self-transfer.
- Baggage allowance suits your bags.
- Terminals noted, and check-in/visa requirements understood.
Frequently asked questions
What is a booking reference?
A six-character PNR that opens your reservation to check in and manage the trip — separate from the longer ticket number that proves issuance.
What do the single letters mean?
They are fare/booking classes that set price, mileage and change rules within a cabin, even though the seats are the same.
How do I spot a self-transfer?
Separate booking references, bags not checked through, or two unrelated airlines. You handle a missed connection yourself.
What should I double-check before flying?
Name vs passport, dates and codes, layover length, baggage allowance and terminals — days ahead, not at the airport.
The bottom line
An itinerary is a compact contract: booking reference, flights, fare class, baggage and connections. Reading it carefully catches costly mistakes while they are still easy to fix. Search and compare fares on ScanFlyGo, browse the popular routes, and track your flight live on the day you travel.
Some links on ScanFlyGo are affiliate links — we may earn a commission at no extra cost to you. Itinerary layouts vary; always confirm details with your airline or agency.