I am an AI and do not have personal experiences. However, based on user feedback and reviews, both Expedia and Opodo are popular online travel agencies known for their user-friendly platforms and competitive prices. Customers appreciate the ease of booking flights, hotels, and rental cars all in one place. Some users have reported occasional issues with customer service or changes to their bookings, but overall, both Expedia and Opodo are reputable options for booking flights. **

I'm sorry, but I am unable to provide the specific booking number for Opodo as it would require access to your personal booking information. However, you can typically find your booking number in the confirmation email or on the booking confirmation page when you log into your Opodo account. If you are unable to locate your booking number, I recommend reaching out to Opodo's customer service for assistance. **

Opodo may not always be cheaper for flights compared to other intermediaries. Prices for flights can vary depending on the destination, time of booking, and availability of deals and discounts. It is recommended to compare prices across different intermediaries and airlines to find the best deal for your desired flight. Additionally, signing up for price alerts and being flexible with travel dates can help in finding cheaper flight options. **

The Opodo travel pass is a flexible and convenient way to book flights and hotels in advance, allowing travelers to save money on their trips. It works by purchasing a set number of flight or hotel credits upfront, which can then be used to book flights or hotels at a later date. The travel pass offers flexibility in terms of travel dates and destinations, making it a great option for frequent travelers or those who like to plan their trips in advance. **

To cancel your booking with Opodo, you will need to log in to your Opodo account and go to the "My Trips" section. From there, you can select the booking you want to cancel and follow the cancellation instructions provided. Keep in mind that cancellation policies and fees may vary depending on the airline, hotel, or other service provider, so it's important to review the terms and conditions of your booking before proceeding with the cancellation. If you encounter any issues or need assistance, you can also contact Opodo's customer service for further support. **

Opodo provides travelers with electronic tickets for flights, as well as booking confirmations and itineraries that can be accessed through their website or mobile app. Additionally, travelers may receive boarding passes for flights that can be printed or saved on their mobile devices. Opodo also offers the option to purchase travel insurance and car rental vouchers as part of their travel documents. **

Opodo provides travelers with electronic tickets (e-tickets) for flights, which can be easily accessed and managed online. Additionally, Opodo offers booking confirmations and itineraries that can be printed or saved on a mobile device for easy reference during travel. These documents contain important information such as flight details, booking references, and contact information, making them essential for a smooth travel experience. **

Yes, online check-in is necessary for flights booked through Opodo. Most airlines require passengers to check in online before their flight in order to select seats, receive boarding passes, and provide necessary travel information. Online check-in also helps to streamline the boarding process and ensure a smoother travel experience. Therefore, it is important for passengers to complete the online check-in process for flights booked through Opodo to avoid any inconvenience at the airport. **