AirHint found the following cheapest one-way flights from Washington (DCA) to Colombo (CMB) in December 2025 (see full year).
One-Way flights
| 04 Dec | jetBlue | ||
| 06 Dec | jetBlue | ||
| 09 Dec | Air Canada | ||
| 07 Dec | Air India | ||
| 19 Dec | jetBlue |
Also check the deals for return flights from Washington to Colombo in December.
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