Many cards from both Amex and Chase offer similar trip delay insurance — though there appears to be one standout difference in the terms: American Express requires that you book round-trip travel, and Chase does not. According to American Express, a covered trip "may consist of roundtrip, one-way, or combinations of roundtrip and one-way tickets with Common Carrier(s)." However, it also specifies that the trip "ends when the Eligible Traveler returns by Common Carrier to the city of departure."