Cheap Flights between Chicago, IL: OHare & London, United Kingdom: All Airports (All Taxes & Fees Included)
| Airline | Cheapest flight of the day | Departure Day | Returning |
 | $1115 on American Airlines 1 stop Round trip economy | 07 Jul 2010 | 14 Jul 2010 |
| $1154 on American Airlines 1 stop Round trip economy | 08 Jul 2010 | 15 Jul 2010 |
| $1154 on American Airlines 1 stop Round trip economy | 09 Jul 2010 | 16 Jul 2010 |
| $1221 on American Airlines 1 stop Round trip economy | 10 Jul 2010 | 17 Jul 2010 |
| $1168 on American Airlines 2 stops Round trip economy | 12 Jul 2010 | 19 Jul 2010 |
 | $1263 on Air Canada 1 stop Round trip economy | 13 Jul 2010 | 20 Jul 2010 |
 | $1204 on United Airlines 1 stop Round trip economy | 14 Jul 2010 | 21 Jul 2010 |
| $1235 on American Airlines 1 stop Round trip economy | 16 Jul 2010 | 23 Jul 2010 |
| $1263 on Air Canada 1 stop Round trip economy | 19 Jul 2010 | 26 Jul 2010 |
| $1211 on United Airlines 1 stop Round trip economy | 20 Jul 2010 | 27 Jul 2010 |
| $1271 on Air Canada 2 stops Round trip economy | 21 Jul 2010 | 28 Jul 2010 |
| $1265 on United Airlines 2 stops Round trip economy | 26 Jul 2010 | 02 Aug 2010 |
 | $1209 on Continental Airlines 1 stop Round trip economy | 27 Jul 2010 | 03 Aug 2010 |
| $1165 on United Airlines 2 stops Round trip economy | 28 Jul 2010 | 04 Aug 2010 |
| $1237 on American Airlines 1 stop Round trip economy | 30 Jul 2010 | 06 Aug 2010 |
| $1273 on United Airlines 2 stops Round trip economy | 31 Jul 2010 | 07 Aug 2010 |
 | $1272 on Us Airways 1 stop Round trip economy | 01 Aug 2010 | 08 Aug 2010 |
| $1177 on American Airlines 1 stop Round trip economy | 02 Aug 2010 | 09 Aug 2010 |
| $1156 on American Airlines 1 stop Round trip economy | 03 Aug 2010 | 10 Aug 2010 |
Taxes and fees included
Jun 30 2010 6:00AM