United Airlines reservations phone number and when to call
United Airlines reservations can be made by phone at 1-800-864-8331. This number connects you to United's domestic reservations team during business hours. The line is available seven days a week, though wait times vary by time of day and season — calling early morning or mid-week typically means shorter holds than calling evenings or weekends.
You can also reach United through their international reservations line at 1-773-686-1111 if you are booking flights outside the United States or need information with international routes. Both numbers handle new bookings, changes to existing reservations, and questions about fares and seat availability.
Before calling, have your confirmation number ready if you are modifying an existing reservation, or your travel dates and preferred airports if you are booking a new flight. United's phone agents can also discuss baggage policies, seat selection, and frequent flyer miles during the same call.
Key Takeaways
- United's main reservations number is 1-800-864-8331 for domestic flights, available seven days a week.
- International reservations use a separate line at 1-773-686-1111 for flights outside the United States.
- Phone agents can book new flights, modify existing reservations, and answer questions about baggage and seat selection in one call.
- Early morning and mid-week calls typically have shorter wait times than evenings and weekends.
- Having your confirmation number or travel dates ready before calling speeds up the process.
What to expect when you call
When you call United's reservations line, an automated system will first ask you to confirm whether you are calling about a new booking or an existing reservation. If you are modifying a current flight, the system may ask for your confirmation number to pull up your booking before connecting you to an agent. If you are booking new, you will typically be routed directly to a reservations agent.
Wait times vary. During peak travel seasons (summer, holidays, spring break) or on Friday and Saturday afternoons, you may wait 20 to 45 minutes. Off-peak times like Tuesday through Thursday mornings usually have waits under 15 minutes. United does not offer callback options on the reservations line, so you will hold until an agent picks up.
Agents can discuss available flights, compare prices across dates, explain baggage fees, and process payment over the phone. They can also add seat selections, frequent flyer miles, or special requests like wheelchair information or unaccompanied minor services during the same call.
Alternatives to calling United reservations
If you prefer not to call, United's website at united.com allows you to book flights, modify reservations, and manage your account without speaking to anyone. The website shows the same fares and availability as the phone line and lets you complete a booking in minutes. You can also check in online 24 hours before departure and change or cancel flights through the website.
United's mobile app offers the same booking and reservation management features as the website, plus real-time flight status and gate information once you have booked. The app also stores your boarding pass and lets you change seats or add baggage after booking.
For account-related questions or issues the website cannot resolve — such as disputing a charge, requesting a refund, or discussing a damaged bag — phone contact is usually necessary. Chat support is not currently offered by United for reservations, though the website has a contact form for non-urgent inquiries.
Phone reservations versus online booking
Booking by phone and booking online show the same available flights and fares. The main difference is time and control. A phone agent can discuss your preferences, suggest alternative dates or airports, and explain baggage policies before you commit. If you are unsure about dates or have complex travel needs — such as booking multiple passengers with different frequent flyer accounts or arranging connections through a specific hub — an agent can walk through options with you.
Online booking is faster if you know exactly what you want. You see all available flights at once, can compare prices across dates, and complete the purchase without waiting. You also receive your confirmation number when ready and can print or save your itinerary right away.
Neither method charges a fee. United does not add a phone booking surcharge, so cost is identical whether you call or book online. The choice comes down to whether you value the agent's guidance or prefer to book independently.
Special situations requiring a phone call
Some reservations require phone contact because the website cannot process them. If you are booking a flight for a passenger under 18 traveling alone, United requires phone verification. If you need to add a lap infant (a child under two sitting on an adult's lap) to an existing reservation, you must call — the website cannot add infants to bookings.
If you are using a voucher, travel credit, or special promotional code, the website may not accept it. Calling allows an agent to manually explore the credit to your booking. Similarly, if you are booking a flight that requires a visa or passport number — such as an international flight — an agent can collect and verify that information over the phone.
Passengers with disabilities who need specific accommodations, such as wheelchair information or a seat near the lavatory, should call to may support the request is documented in the reservation. While the website has a field for special requests, phone booking guarantees the agent has confirmed the accommodation is available on your specific flight.
Preparing for your call
Gather these details before calling to speed up the process. For a new booking, have your departure and arrival cities, preferred travel dates, and the number of passengers ready. For modifying an existing reservation, have your confirmation number — a six-character code sent in your booking confirmation email — or your last name and phone number to look up the reservation.
If you are paying by credit card, have the card number, expiration date, and billing zip code available. If you are using frequent flyer miles, have your MileagePlus account number ready. If you are adding a passenger under 18, have their full name and date of birth.
Write down any questions before calling so you do not forget them during the conversation. Agents can discuss baggage allowances, seat selection fees, change policies, and frequent flyer earning rates, so asking everything in one call avoids a second hold.
Frequently Asked Questions
Can I book a flight over the phone without paying when ready?
No. United requires payment at the time of booking, whether you call or book online. The agent will ask for a credit card, debit card, or other payment method before confirming your reservation. You cannot hold a flight without paying.
What if I call and the agent makes a mistake on my reservation?
If an error is made during the call, tell the agent when ready and they can correct it before finalizing the booking. If you discover an error after hanging up, call back with your confirmation number and the agent can modify the reservation. United does not charge to fix agent errors.
Do I need to call to cancel a flight I booked by phone?
No. You can cancel any United flight through the website or app using your confirmation number, regardless of how you booked it. The website will show you whether you receive a refund or travel credit based on your ticket type and when you cancel.
Is the reservations number the same for changes and new bookings?
Yes. The same number, 1-800-864-8331, handles both new bookings and changes to existing reservations. The automated system will ask which you need when you call, then route you to the appropriate agent.
What happens if I get disconnected during my call?
If you are disconnected before your reservation is confirmed, the booking was not completed and you will not be charged. Call back and start over. If you were already confirmed and the call dropped, your reservation is saved — you can look it up online or call back to verify the details.