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Book United Airlines cheap flights to 300+ destinations worldwide on our official site. Find our most popular flight deals and earn MileagePlus® miles.

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Search for flights on United and more than 80 airlines. Find adult, senior, child and pet fares, and use money or miles to book. Apply promo codes and use certificates.

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Oct 28, 2025 · You can reschedule your trip and we’ll waive change fees and fare differences. But, your new flight must be a United flight departing between 7 days before and 7 days after your original …