Typically, the best day to book United flights is Tuesday, as fare discounts are often released on Monday night. For more tips on securing the....
https://www.devex.com/people/free-booking-what-is-the-cheapest-day-of-week-to-book-united-flight-2019080

You can upgrade from economy to business class on United Airlines, depending on availability and fare class. Upgrades can be requested online or at check-in.....
https://www.transfermarkt.com/-united-business-can-i-upgrade-from-economy-to-business-class-in-united-/thread/forum/659/thread_id/5332/page/1#anchor_5

To get a free seat upgrade on United Airlines, consider joining their MileagePlus loyalty program and using accumulated miles. Occasionally, upgrades may also be offered....
https://www.transfermarkt.com/-united-upgrade-how-to-get-a-free-seat-upgrade-on-united-/thread/forum/659/thread_id/5297/page/1#anchor_5385

Yes, you can upgrade your United Airlines seat after purchase, depending on availability and fare class. Upgrades can be requested online or through customer service.....
https://www.transfermarkt.com/-united-guide-can-i-upgrade-my-united-seat-after-purchase-/thread/forum/659/thread_id/5263/page/1#anchor_5351

United Airlines offers free rebooking options for specific fare types and circumstances. To determine your eligibility and get more information, contact their customer service at....
https://www.transfermarkt.com/does-united-have-free-rebooking-/thread/forum/659/thread_id/5079/page/1#anchor_5167

Changing a flight on United Airlines typically incurs a fee, depending on the fare type. For specific details and assistance, call their customer service at....
https://www.transfermarkt.com/how-much-is-the-fee-to-change-a-flight-on-united-airlines-/thread/forum/659/thread_id/4989/page/1#anchor_5078

Yes, United Airlines offers a 24-hour risk free cancellation policy. You can cancel any flight within 24 hours of booking for a full refund ,....
https://www.transfermarkt.com/ua-policy-what-is-the-cancellation-policy-for-united-airlines-instant-cancel-amp-amp-refunds/thread/forum/659/thread_id

The customer service of United Airlines is one of the most preferred methods to book the United Airlines group flight tickets. You have to dial....
https://www.transfermarkt.com/how-do-i-contact-united-airlines-group-travel-1-877-593-8882/thread/forum/659/thread_id/3368/page/1#anchor_3556

What is the cancellation policy for United Airlines? United Airlines provides a 24-hour cancellation policy. If you need to cancel your United flight, you can....
https://www.transfermarkt.com/-united-cancellation-what-is-united-airlines-cancellation-policy-/thread/forum/659/thread_id/3106/page/1#anchor_3297

The cancellation policy for United Airlines includes a 24-hour risk-free cancellation period, during which you can cancel your flight without any fees, as long as....
https://www.transfermarkt.com/united-airlines-cancellation-policy-cancellation-policy-c-ua-/thread/forum/659/thread_id/3040/page/1#anchor_3232