--- title: "US port code 3910: Chicago Midway Int'l Airport, Illinois · Adhoc" description: "3910 is the US port of exit code for Chicago Midway Int'l Airport, Illinois on Canadian customs declarations." canonical: "https://www.adhocs.ca/us-ports-of-exit/3910" last_updated: 2026-07-27 --- # 3910 Chicago Midway Int'l Airport, Illinois US port of exit US port of exit · Airport 3910 is the US code for the port of Chicago Midway Int'l Airport, Illinois. A Canadian declaration uses it when goods left the United States through Chicago Midway Int'l Airport. - **Port code:** 3910 - **Port:** Chicago Midway Int'l Airport - **State:** [Illinois](https://www.adhocs.ca/us-ports-of-exit/illinois) - **CBP district:** Chicago, IL - **Kind:** Airport ## Other US ports in Illinois - [3901](https://www.adhocs.ca/us-ports-of-exit/3901) Chicago (Port of entry) - [3902](https://www.adhocs.ca/us-ports-of-exit/3902) Peoria (Port of entry) - [3908](https://www.adhocs.ca/us-ports-of-exit/3908) Davenport, IA-Rock Island (Port of entry) - [3909](https://www.adhocs.ca/us-ports-of-exit/3909) Rockford Airport (Airport) - [3971](https://www.adhocs.ca/us-ports-of-exit/3971) TNT Express Consignment, Chicago (Courier facility) - [3983](https://www.adhocs.ca/us-ports-of-exit/3983) Chicago Executive Airport (Airport) - [3987](https://www.adhocs.ca/us-ports-of-exit/3987) UFA UI Willard Airport, Savoy (Airport) - [4581](https://www.adhocs.ca/us-ports-of-exit/4581) Midamerican Airport (Airport) ## Good to know - **Which US port.** CBSA defines it as the US port where the truck or train crosses into Canada, or the one nearest to where it crosses. For goods sent by ship or plane, it is the US port where they were loaded. - **Courier shipments.** Low-value courier shipments name 1001, New York, as the US port of exit. Also in this directory: [CBSA offices](https://www.adhocs.ca/cbsa-offices) · [Warehouse codes](https://www.adhocs.ca/cbsa-warehouses) · [Border crossings](https://www.adhocs.ca/border-crossings) ## Questions ### What is US port code 3910? The code for the port of Chicago Midway Int'l Airport, Illinois. On a Canadian declaration, it says the goods left the United States through it. ## Sources - [Ports of entry](https://www.cbp.gov/contact/ports), U.S. Customs and Border Protection - [Memorandum D17-1-10, Coding of Customs Accounting Documents](https://www.cbsa-asfc.gc.ca/publications/dm-md/d17/d17-1-10-eng.html), Canada Border Services Agency Adhoc is not affiliated with CBSA or CBP.