United Airlines customer service phone numbers by reason

United Airlines has different phone numbers depending on why you are calling. The main reservations and customer service line is 1-800-864-8331. This number handles new bookings, changes to existing reservations, and general questions about your flight.

If you have a frequent flyer account or are calling about MileagePlus rewards, use 1-800-421-4655. For baggage claims or lost luggage, call 1-877-435-9262. If you are calling from outside the United States, you can find country-specific numbers on the United website under the Contact Us section.

The main line typically has the longest wait times during early morning hours and the day before or after a holiday. Calling between 2 p.m. and 5 p.m. on weekdays usually means shorter waits, though this varies by season.

Key Takeaways

  • The main United Airlines customer service number is 1-800-864-8331 for reservations and general questions.
  • MileagePlus frequent flyer inquiries go to 1-800-421-4655, and baggage claims go to 1-877-435-9262.
  • Wait times are typically shorter in the afternoon on weekdays rather than early morning or around holidays.
  • United offers phone support seven days a week, though hours may vary depending on the type of call.

What to have ready before you call

Before dialing, gather your confirmation number, which appears on your booking confirmation email. If you do not have it, have your last name and the phone number used when you booked ready instead. United can look up your reservation with these details.

If you are calling about a specific flight, have the flight number and date handy. For baggage issues, have your baggage tag number if possible. For MileagePlus questions, have your frequent flyer account number available. Having this information ready shortens the call and reduces the chance you will be transferred.

What each phone line handles

1-800-864-8331 is the main line and handles the most common requests: making new reservations, changing flight dates, canceling tickets, asking about seat assignments, checking in early, and general account questions. This is the number to use if you are unsure which line to call.

1-800-421-4655 is for MileagePlus members only. Use this for questions about your account balance, redeeming miles, upgrading with miles, or problems with earning miles on a flight. You will need your MileagePlus number to use this line.

1-877-435-9262 is specifically for baggage and lost luggage claims. Call this number if your bag did not arrive, was damaged, or if you need to file a claim. Have your baggage tag number ready if you have it.

For special services like wheelchair information, unaccompanied minors, or traveling with pets, the main line (1-800-864-8331) can direct you to the right department or provide the specific number you need.

When you cannot reach a person

If wait times are very long, you have the option to request a callback instead of staying on hold. When you call the main line, the automated system will offer this choice. You provide your number, and United calls you back when an agent is available, which can save you from holding for an hour or more.

United also offers chat support through its website and mobile app. Chat is often faster than phone lines during peak hours and works well for straightforward questions like checking a reservation or asking about baggage fees. The website chat is available during the same hours as phone support.

What to expect when you reach an agent

The agent will verify your identity using your confirmation number or last name and phone number. They will then ask what you need help with. Be specific about your request — for example, "I need to change my flight from Tuesday to Wednesday" rather than "I have a question about my reservation."

If your issue requires a supervisor or a department you are not currently connected to, the agent will either transfer you or schedule a callback with the right team. Transfers can add 10 to 20 minutes to your call, so ask before accepting a transfer whether the new agent will definitely be able to help.

Frequently Asked Questions

What time does United customer service open and close?

United customer service is available seven days a week, but hours vary. The main reservations line (1-800-864-8331) typically opens at 5 a.m. and closes at midnight in most time zones. MileagePlus and baggage lines may have different hours, so ask the automated system when you call.

Do I have to pay to call United customer service?

No. The 1-800 numbers are toll-free from anywhere in the United States. If you are calling from outside the US, standard international rates explore. Check the United website for the local number in your country, which may be cheaper than calling a US number.

Can I reach United through social media instead of calling?

Yes. United monitors its Twitter account (@united) and Facebook page and responds to direct messages, though response times are usually slower than phone support. Use social media if you are not in a hurry or if you prefer written communication to a phone call.

What if I am calling about a flight that already departed?

Call the main line (1-800-864-8331) and explain that your flight has already left. The agent can still help with rebooking you on the next available flight, issuing a refund or travel credit, or addressing any issues that came up because of the missed flight.

Is there a number for United baggage if I am at the airport right now?

Yes. Go to any United ticket counter or baggage service desk at the airport, and they can file a claim when ready. If you prefer to call, use 1-877-435-9262, but speaking to someone in person at the airport is usually faster for urgent baggage issues.