After an initial flurry of activity for travel brands in the third quarter, as lockdown restrictions eased in some countries, 2020 ended on a downbeat note for many companies.
Some of the publicly listed players in the sector talked of early signs of a recovery in their revenues in the third quarter, as our previous charted indicated.
This followed the most dramatic hit came in the second quarter of 2020 - a period that was the most brutal in the history of the online and travel technology sectors.
The fourth quarter of the calendar is traditionally a quieter period for bookings in the travel sector but this came at the same time as travel restrictions were imposed once more in some key markets in Europe.
Travel activity did not resume to any noticeable level in other markets.
PhocusWire first produced its visualization of digital travel company quarterly revenues going back decades in November 2019.
The chart begins in 1995.
Several companies in international markets only report earnings on a half-year basis, which means their revenue numbers on the chart only change twice a year.
Others such as Hostelworld, OnTheBeach and Travelzoo have yet to report.
Foreign currencies were converted into U.S dollars, using the exchange rate at the time.