Not from all cities and not all 2-1-10:
http://www.allegiantair.com/aaNews/aaNews20091201a.php
To kick off the new service, Allegiant is offering introductory fares as low as $45.99* each way to/from MCO (listed chronologically).
1. Knoxville, Tenn. flights begin Feb. 1, 2010 with fares as low as $49.99* each way
2. Lexington, Ky. flights begin Feb. 1, 2010 with fares as low as $57.99* each way
3. Allentown, Penn. flights begin Feb. 8, 2010 with fares as low as $59.99* each way
4. Greenville/Spartanburg, S.C. flights begin Feb. 8, 2010 with fares as low as $45.99* each way
5. Grand Rapids, Mich. flights begin Feb. 12, 2010 with fares as low as $79.99* each way
6. Springfield, Mo. flights begin Feb. 15, 2010 with fares as low as $79.99* each way
7. Tri-Cities, Tenn. flights begin Feb. 15, 2010 with fares as low as $47.99* each way
8. Huntington, W.V. flights begin Feb. 16, 2010 with fares as low as $59.99* each way
9. Youngstown, Ohio flights begin March 4, 2010 with fares as low as $59.99* each way
10. Des Moines, Iowa flights begin March 5, 2010 with fares as low as $79.99* each way
Other cities will still be flying into Sanford.