It's easier to read if you put in the line breaks:-

TUE 09SEP03 BOSTON /SEATTLE 09/0000 09/2359 G*GAL
1 BOS SEA 0755 1110 AS 9 FA UL YA SA BA MA HA QA LA VA#73G B
2 BOS SEA 0940 1245 AA 229 F7 Y7 B7 M7 K7 H7 Q7 V7 N7 S7#738*C
3 BOS SEA 0940 1245 @AS1551 FA YA SA BA MA HA QA LA VA KA#738 B
4 BOS SEA 1800 2112 AS 15 FL UL YA SA BA MA HA QA LA VA#73G B
5 BOS ORD 1015 1148 UA 531 F5 Y9 B9 M9 H9 Q9 V9 W9 T9 S9#320*C
6 ---- SEA 1220 1445 @US7319 F9 A9 Y9 B9 M9 H9 K0 V0 Q0 L0 757*C
7 BOS ORD 1015 1148 UA 531 F5 Y9 B9 M9 H9 Q9 V9 W9 T9 S9#320*C
8 ---- SEA 1220 1445 UA 307 F9 Y9 B9 M9 H9 Q9 V9 W0 T0 S0#757*C

I've inserted the dashes to try to preserve the formatting in the display which has spaces. Line 5 and 6 are a connection, as are lines 7 and 8 - both through ORD.

Many of your questions may be explained by the posts on this thread. Three character aircraft codes can be decoded from http://www.airlinecodes.co.uk as can three character airport codes.

[This message has been edited by Globaliser (edited 08-17-2003).]