Update as of 12:50 pm: Akamai Technologies has said via Twitter that the outage has now been resolved. No word just yet on what may have caused these sites to crash or any long-term effects.If you’re currently trying to access a travel company’s website and it’s not working, you’re not alone.The servers that run a number of major websites appear to have crashed Thursday morning. Affected websites include Delta, Southwest, Airbnb, Vrbo, Expedia (including sister sites like Orbitz and Hotels.com), Concur Solutions, Fidelity Investments and more. Some websites, such as Chase and American Express, are up but running extra slow.For more TPG news delivered each morning to your inbox, sign up for our daily newsletter.Users visiting affected sites will either be directed to an error page or a blank screen.Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.(Screenshot courtesy of expedia.com)The cause appeared to be linked to an outage on Akamai, a major domain name system (DNS) provider.According to Downdetector.com, it appears that this issue began around 11:30 a.m. Although some companies are advising website visitors to try their mobile apps, based on our tests, the apps of companies like Delta are down as well.While you can’t book new travel or make changes right now, it seems that there are no major travel disruptions right now. Delta and Southwest’s airport computers are still working fine and it appears that no flights have been delayed yet because of the website outage.This is a breaking news story and will be updated. Check back for more.