1. Southeast Asia: Many destinations in Southeast Asia like Vietnam, Thailand, and Cambodia offer affordable accommodation, food, and activities, making them great value for money. During Christmas, these countries will have fewer crowds and offer warm weather for beach holidays.

2. Central America: Countries like Mexico, Guatemala, and Costa Rica are a bit cheaper during the Christmas period and offer a variety of activities, from exploring ancient Mayan ruins to surfing in warm ocean waves.

3. Eastern Europe: Countries such as Hungary, Poland, and the Czech Republic can be cheaper alternatives to Western Europe. The festive markets and snow-laden landscapes are truly a sight to behold during Christmas.

Best Days and Times to Travel:

Generally, flying on the cheapest days of the week, such as Tuesday and Wednesday, can help you save on airfare. The most expensive days to fly are typically Fridays and Sundays. It's also generally cheaper to fly on Christmas Eve or Christmas Day if you're planning to be away over the holiday. Avoiding peak travel times such as early morning or late afternoon can also help you save money, as these flights tend to be pricier. Always try to book flights a couple of months in advance for the best prices. For Christmas 2023, it would be best to start checking prices around August or September 2023. Remember that these are general guidelines and prices can vary depending on many factors. Using price comparison websites and setting price alerts for flights can be beneficial in securing the best deals. Lastly, bear in mind to follow the current travel advice regarding the global health situation before making any bookings.